I will change a bit the order of quoting
As for the Zune, it's clearly a media player UI. That Metro has that style is unsurprising, but the original Zune in no way portends Metro.
How can say so it's beyond my comprehension. Have a look at this side-by-side picture of Zune V1 and V2: http://www.engadget.com/2007/11/13/zune-2-0-update-ready-for-your-first-generation-zune I'm pretty sure everyone can recognize traits of the same design language.
Metro and WP7 before it were a striking change from the Windows GUI and Windows Mobile. The changes that they made were similar to the ones Apple made of getting rid of much of what makes a PC OS a PC OS.
TBH, I think this is simply a common belief coming from Apple marketing department and channeled through Apple fan boys. If anything, I'd say that Microsoft GUIs are exactly what were already under change. Apple simply pushed the changes to happen (far) more quickly.
For example, have a look at these:
- Zen Portable Media Center (announced 2003, release 2004). This is probably the most stretched example. However, it's the first one I could trace back regarding the shift to typography based GUIs as Metro. Interface example here http://en.wikipedia.org/wiki/Portable_Media_Center
- Windows Media Center (around 2006). This is the first clear example of where MS was hading to with GUIs for devices that were not regular PCs. Early interface examples here http://en.wikipedia.org/wiki/Windows_XP_Media_Center_Edition and here http://www.youtube.com/watch?v=Rn_WwstUIlE
- Zune device and software (around 2006-2007). The first generation already headed to typography based UI, later generations are clearly Metro styled. Examples of the device OS here http://en.wikipedia.org/wiki/Zune and here http://www.engadget.com/2007/11/13/zune-2-0-update-ready-for-your-first-generation-zune example of the software here http://en.wikipedia.org/wiki/Zune_Software
- XBox 360 (around 2008). Again, first generations (of the Dashboard) were only seminal, the new one is clearly Metro. Examples are here http://news.cnet.com/hands-on-with-the-new-xbox-360-dashboard and the new one here http://en.wikipedia.org/wiki/File:1home30rock0531.JPG
- Windows Mobile 6.5 (around 2010). With 6.5 you can clearly see similarities with Metro. Then again, the real Metro was around the corner. Still, you can see there's a continuity from the Zune (2007). Examples here http://en.wikipedia.org/wiki/Windows_mobile
Save all pictures somewhere, review the Metro design language article here http://en.wikipedia.org/wiki/Metro_(design_language) and then tell me again that Microsoft started changing GUIs after Apple push.
MS was already undertaking changes in various GUIs and I can clearly see the Metro design behind those changes. They may have not spelt out a name for it, and/or formally defined design rules, but I can clearly see the common roots. They already had the grounds and simply came up with the concept of tiles that was new.
Prior to the iPhone, MS's answer to tablets and phones was to shoe-horn in Windows. Apple was the first to make a tablet OS designed specifically *for* the tablet, and not just a PC OS with alternate input methods.
and let me take also another quote from your original message:
This is MS rightfully working to fix their tablet OS after someone else showed them how it's done. It's not done by tacking touch into their desktop GUI.
MS already had several open fronts were they had to re-think GUIs before Apple even started hinting they would release a tablet: Xbox, Zune, Windows Media Center and Windows Phone. They were already working on GUIs for several different devices where the traditional Desktop GUI was not the way to go. It just takes time for a player that is already in the market and have an estabilished developer base (did you see the massive outcry with the new APIs? and the incredible amount of FUD going around? people seems to believe .NET will be dead in a couple of months when in reality even COM is still pretty much alive). Moreover, it sometimes take also technology to advance before you can make some changes (think touch screens of the past, could you really use it without a stylus?).
But with tablets the problem is different: MS simply didn't believe there was a big market except for niches (again, tablets used in production lines or hospitals). They didn't believe so many consumers were prepared to pay for a light-weight OS to do coach surfing, seeing videos etc. Especially at such a high prices. Quite honestly, who could predict it? I'm not even sure whether it was really a need or rather the proverbial "field distrortion" at work once again. But let's simply say it was a mistake from MS. They quickly started catching up on the ground of what was already being done in the UI space.
Don't make the mistake to think that MS is a million pound gorilla sitting on the market just trying to squeeze every single penny from obsolete technologies. MS constantly pushes in a lot of different directions. Just check Microsoft Research site.
For example, they did a lot of research in the field of image reconstruction in both still photography (based on other, similar, photos) and videos (based on other frames). They may not have anything really ready for prime-time, but they are constantly working on new things. Again, as an example, in Windows Live Photo Gallery there's the technology to merge photos in order to replace closed eyes from other photos (photo fuse). It's not as great as it sounds yet, but eventually it will become usefull in future.
GUIs, and mobile devices in general, are no exception. However, MS tend to push things slowly to the market. Partly because it's really a million pound gorilla; partly because they used to be very conservative with disruptive changes (backward compatibility used to be priority number one before Metro/Windows8/Sinofsky). Also, it may sound strange given the common perception as markeeters, but they are not always good at it. Especially with things that can change radically the market. Hell, even with the Kinect: it's a great concept, they sold millions of them, yet I feel as if they are not really pushing it as they could (e.g. few games exploiting it).
Anyway, MS is clearly following right now in the tablets market. However, saying it's copying from Apple it's simply not true. It's not true for GUIs and it's not true for the WinRT APIs (which is the *real* thing in Windows 8). Moreover, I believe that there's still a lot that can happen. There's a good post in another thread here that is quite interesting. Moving forward, we will see if keeping the option to run also desktop software on tablets will be an advantage or not (think docked tablets). It just take a bit more computing power at low energy consuption. Then running both Metro and Windows 7 GUIs will make perfect sense.