From Modmyi.com
http://modmyi.com/forums/mac-news/682963-snow-leopard-itablet-support.html
"More from the irresponsible speculation department.. but IMHO more logically reasoned in this instance: Leander Kahney over at Cult of Mac just found a ridiculously huge virtual keyboard in Snow Leopard.
Located in System Preferences, it serves the same function as it did under Leopard, but is much larger. There's no reason I can think of why one would need a huge virtual keyboard just to show them what happens when you press the option key.
I find this fairly persuasive evidence of hooks being set in the OS for a touchscreen Mac, though I am aware of my bias, being on record as an iTablet fanboi. So take this, as every piece of speculation, with a grain of salt."
cue, tablet talk