Not to take anything away from Jeff Han, because he's done some great work, but most of the techniques he demonstrates in that video were invented by other people. For example, the use of the pinch gesture for resizing was first published almost 20 years ago. Multi-touch interaction research has a long history, but since the techniques are only now coming to consumer devices, Jeff Han and Apple seem to be getting all the credit.

See http://www.billbuxton.com/multitouchOverview.html for a thorough review of multi-touch research.