Description on Youtube:
Presentation by Jeff Han of a futuristic multi-touch interface during the Adobe sponsored TED2006. Jeff Han is a research scientist for NYU's Media Research Lab, and the inventor of an "interface-free" touch-driven computer screen. (Recorded February 2006 in Monterey, CA. Duration: 09:32)
(Found this via a Slashdot comment)
I though I would not think that this could immediately replace a keyboard completely, especially in terms of speed (tactile feedback isn't something that can easily be replicated off of a screen, yet), this will definitely aid in replacing the mouse. And if it can also add in tablet-type functionality (like a physical pen, brush, and air-brush tool), it could be a boon for visual artists. Also, interactions by different users on the same screen would be possible with this.