PC World posted an article on hardware for Windows 8

Specifically, the screens include hot corners where mousing into them causes navigation features to pop up. Bottom right: Charms bar. Top left: open applications. Bottom left: Start tile.

Responsiveness to touch can vary. The HP TouchSmart 520 PC all-in-one desktop used here was tricky to master and could involve several flicks and touches to get the system to respond, particularly in these corners.

That was with the earlier Consumer Preview version of Windows 8. With Release Preview Microsoft apparently left out the drivers for the touchscreen as it did in the earlier version initially, so touchscreen didn't function at all. With Consumer Preview, Microsoft eventually upgraded to provide the missing drivers.

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