1) The file: open, save, close is really designed around a dual floppy paradigm. It makes no sense at all with SSD hardware.
What would make sense? You still open files. You still save them. And you still need to close them (or have some means of releasing locks on them so that they can be moved/copied/backed up/etc).
2) As the number of system services require notification increase integrated notification handling becomes key
This is, essentially, what an idea "Event Viewer" should be doing.
3) As device types become much more variable (ranging from a watch to a 55+" TV) graphics need to switch more readily
You're mistaking form-factor for something that actually matters.
When you're talking about a 55" TV, you're talking about what? SD Widescreen? HD? SHD? 4K? What? Resolution's the issue, not the device itself.
And the answer isn't necessarily "waste more space so stuff remains clickable on high-res or touchscreens"
4) As input devices became more variable applications needed to take better advantage of them
So Microsoft and application developers should be building in NATIVE SUPPORT for my left-right testicle-twitch control unit?
And my retrofitted Atari Paddle controller should be AWESOME in Excel right?
Face it. Standard desktop is 1-3 monitors, a keyboard, directional controller (mouse or mouse simulant (rollerball, touchpad, or joystick)), speakers and a microphone.
If Microsoft wants to give the OPTION for new interfaces, great!
But forcing everyone (including enterprise partners, where retaining costs MONEY), over to a new UI paradigm when there was nothing intrinsically wrong with the old one, is Just Fucking Stupid.
There are basically NO functionality enhancements added to Windows 8 that required such a drastic UI revamp for desktop users. And there was DEFNITELY no reason behind applying that crap to Server 2012!
I've also used Win8 as a tablet interface. It works fairly nicely. But I STILL don't want it replacing my desktop UI!