This is interesting: a radical new look at how our operating systems could work in the future (as long as you have most of your fingers). The presentation video provides a very elaborate explanation of how it works and why it's better than current systems.

There are quite a few issues which aren't covered, like file management (dragging, binning, etc...) and the fact that positioning windows both vertically and horizontally on your desktop is actually part of of many people's workflow but overall one of the more viable ways to look at multitouch computing.

Most importantly, it makes you rethink some key things about UI and human interfacing which is a very good thing. Great piece of work.