Looking at the video we can see a well-working multi-touch demo, but nothing on how that technology would be used in every-day works. So far looks like more an advanced mouse replacement than a brand-new way to use pc. I hope that other interface changes, that should enable users to enjoy multi-touch even when working and not only when looking at photos, are Top-Secret classified information and Microsoft choose to perform that demo just to show something to who is asking an early release of Windows 7.
In the last days Steven Sinofsky said that Windows 7 kernel would be an evolution of Vista's one. This is a bad news for the I-will-jump-to-Windows-7 boys that have to update their claim in I-will-jump-to-Windows-8 (or somewhere else). Vista users should be happy of this because of the total compatibility between the 2 OS drivers and software since nothing, especially the driver model, will change.
I was dreaming Windows 7 as a fully .Net based OS, with the old Win32 system virtualized just for old applications support so I feel a bit disappointed. On the other side Vista kernel is already a very good piece of software with the only problem that users aren't feeling this. Hopefully Windows 7 would allow the user have a better configuration on what system loads as already happens in Windows Server 2008, a OS that shares huge part of code with Vista, but surprisingly is not considered as bad. Maybe it's because Apple never choose a character for the server in their stupid advertisements.