There's already other 8" (Windows based) tablets out there. Majority of which are powered by Intel Atom processors.

One of them (an ASUS VivoTab Note 8 http://www.asus.com/Tablets_Mobile/ASUS_VivoTab_Note_8_M80TA...) even has a Wacom stylus.

That said, there's been rumours of touch optimised versions of Office being released (soon).

OneNote is pretty good for note taking. I still remember first using it with an XP based tablet/laptop (Toshiba Portege m200) many years back.