http://blogs.msdn.com/b/b8/archive/2...rt-screen.aspx
This blog post brings up some of the questions and concerns that have been raised thus far in the Developer Preview of Windows 8 - and highlights some of the changes they intend to make. The post primarily discusses mouse & keyboard usage, though some of the changes will impact Touch users as well.
They talk about their data collection 'census' statistics, and bring up numerous reasons to motivate their various decisions.
Be aware it is quite long; but if you are interested in where W8 development is going (or hell - feel like raising a point or question) this might be worth to check out.