Although I love my Windows Phone and am interested in a Surface tablet, I agree that Windows 8 is clunky on a desktop. I'm not a fangirl of all things Microsoft.
I'll run Windows 7/Linux on my desktop and laptops.
See, I sold my desktop a year ago because I never use it. I've gotten to a point that I want and need only two devices. A portable machine with some power and a phone with some function. Currently the Arrive treats me well but my convertible laptop lacks touch input and using a tablet with a pen all the time sucks(love the laptop, don't get me wrong the Core 2 Duo will still rip a dvd in under 30 mins). The Surface Pro lets me keep my pen, keyboard, and touch input all in one machine with no need to sync 3 computers(desktop, laptop, tablet). Code Composer Studio is $500 for a single computer license so I can't just go install it on multiple machines.
I used to be REALLY into computers(building, repairing, gaming, tweaking, overclocking, ect) but now all I want is something that works. WPx and W8 look to be my solution... If they pull it off well.
Imagine, you play a bit of Survivalcraft(or Final Fantasy, Spliter Cell whatever floats your boat) on your tablet in front of the TV, go to bed, then on lunch break you whip out your phone and continue where you left off on the tablet at home because it synced the savegame via Skydrive.
Ahhhhh, one can dream.