Developer Steve Troughton-Smith put the iOS Simulator to run on a Mac connected to a Dell ST2220T monitor a 21-inch IPS model, with multi-touch support.
See how cool:
But he didn't stop there, of course. Now, isn't OS X Lion all prepared for this, with several multi-touch gestures coming from iOS?
All of this was possible thanks to touch drivers provided by Touch-Base. great for anyone who truly believes that something like this could come true one day
(via 9 to 5 Mac)