Blake Coulter of SpacClaim sent this over to me the other day. It's by far the most aggressive multitouch application being shown in public right now.
While this is definitely an advance over traditional modelling techniques for revision and minor edits, it still seems a bit like a Frankenstein...Half GUI components that have been implimented in previous revs. and half NUI interace elements.
The way that modes are used in traditionally used to control movement, selection and geometry in CAD still needs to be radically needs to be radically rethought. If a small company like SpaceClaim can succeed at this, the efficiencies they create will put a huge dent in the Autodesk empire.