fingerfans.dreamhosters.com

This article seems like pure speculation but it seems pretty logical too.

http://www.makeshitbreakshit.com/2007/02/28/one-more-thing-leopards-key-feature-to-be-multi-touch/

We can hope!

I sure hope it's true. The bad news, of course, is that the touchscreens will ONLY work with OS X 10.5, and that a 20" display will cost US$2999. :-)