I think Microsoft is making a terrible mistake generalizing tablet and phone interfaces to desktops. First and foremost, the desktop has and will continue to have conventional input devices (mouse and keyboard). That said, the tablet/phone interface is awfully silly for a desktop. Second, tablets suck. I'm going to write more about my opinion in a completely distinct section of my response so that everyone can see it clearly.
Tablets Suck
Soup the tablet up as much as you want. Give it more cores, more RAM, better video and it will still suck. Why? As novel as the input interfaces are, either touch screen or dictation, they suck for anything more complicated than clicking links and reading e-mail. There is a growing myth that Ma and Pa who click links and read news articles make up the vast majority of computer users. Mean while, students, power users, gamers, and corporate users are programming, gaming, writing reports, making power point presentations, making spread sheets, doing their taxes, editing photos, managing collections of files, what else? And the computer industry actually thinks touch screens and dictation can do this well? Alright, you try doing this efficiently with touch screen, see how fast you tire. Ever play Wii? Try talking to your computer for 8 hours straight (and I know a deaf blind guy who programs in C++ with dictation). Give me a break. Tablets suck. Don't be fooled by friends and advertisers ... they're a novelty item at best, but more like a lightbulb (look Ma, it lights the room for 9 hours straight! How power efficient!).
I'll continue to enjoy efficient input and visualization with my keyboard/mouse and dual 28 inch screen setup. If I want portability, I'll use my slightly bulkier laptop which still beats the iPad's 7 or 10inch touch screen.
EDIT: Sorry, I meant blind guy. A talking deaf guy doesn't make sense does it?
