Looks interesting - although I wouldn't even like to attempt to use something like that on a platform that doesn't have an active digitizer (wacom pen with pressure sensitivity) and palm rejection.
One of the USP's of Windows 8 tablet platform vs. iPad is that they can have proper pen input as well as finger touch - like current tablet PC's, but hopefully on a better platform. Hoping that the OEM's don't just try to rip off iPads and have them finger only, but rather think about the additional benefits Windows 8 could bring...

...although looking at how a lot of the OEM's usually screw it up, I'm not holding my breath!