I guess before we can completely do away with the mouse we will need a "bridge" technology. Here is a video on some of the multi-touch mice we are working on here at MS:
http://link.brightcove.com/services/player/bcpid42529855001?bctid=46078094001
Ummm... Like Apple's Magic Mouse?
Um...no.
The Magic Mouse only supports two touch points as near as I can tell whereas these mice are using 4 or more touch points so they really are truly multi-touch rather than just a pretty face. But thank you for playing :)