I'm uninterested in an OS that promises ease-of-use-uber-alles.
I could be wrong, but that phrase implies to me that you have not actually used it yet.
Granted, my experience so far is with an early release of Server 2012 that I added the Desktop Experience to. YMMV and all that. Maybe it does not include quite all of the features of Win8 desktop edition and so is unfair. Perhaps someone can enlighten me.
So far, the default theme is very simple. It is not bling or flashy. Yes, I switched it to the default one after I installed Desktop Experience and so I assume it is more or less what Win 8 will have. It is functional and not graphics heavy. I actually kind of like it because things don't glow at me or become randomly transparent and shit all the time.
The desktop behaves exactly as the desktop for Windows 7. If you're ok with 7, then you have no problem here. Taskbar is same way, sys tray is same way, can still put icons on the desktop. The file system layout is the same. The control panel looks the same. The only difference seems to be that the file manager is now ribbonized, which I don't even mind because I rarely used the file menus in the manager anyway. Not much it can do that a right click menu or keyboard shortcut can't. Plus the ribbon offers to do lots of new things. I was pleasantly surprised that when you click on an ISO file, the ribbon changes to show an icon to mount it. It seems to stay out of your way when doing regular tasks but reflect new features of Windows to let you know what it is capable of, so I do not think this is an issue.
As for Metro, all it seems to have done is replaced the start menu with a start screen. The screen is basically just desktop icons as tiles. I really don't see any fuss. It's like they made the start menu full-screen instead of a popup window. That's really about it, just a second desktop, an extra icons screen. Even the Windows key still opens it. I tap the Windows keyboard key, click the icon, and I have what I need.
My point here is that it is WAY less scary and stupid than I was lead to believe by casually reading slashdot a few months ago. From readers on here, repeating how much it was going to be a disaster and is so phone-UI oriented, I was worried with what I would find when I test-drove it. After having it installed on a computer to test out the new server features, and using it basically as a desktop for a few weeks now to test out other new features, I can say it basically is the same as Windows 7, except a little more speed optimized, less flashy (but still with the nice UI improvements like Snap), and with a full screen start menu. That's really it. Nothing overwhelmingly new, but it is not a disaster either. Just steady progress with updates to the core system, .NET, and it certainly seems rock solid so far. This is coming from someone that loves a KDE desktop at home; I have no intention of giving up Linux at home! But I need Windows for work, like to stay on top of new software/technology, and my experience is that Windows 8 does not seem bad at all, and in fact is a small improvement over Windows 7. Which MS probably recognizes, and that's why they're giving Windows 8 upgrades for much cheaper than in the past.