"Multi touch" for "full-size" devices is pointless. "For geeks only". It will be less useful even than "Tablet PC". Also manufacturers will do anything (set enormous price tag) to kill it as soon as possible, like they did to "Tablet PC" formfactor.
@Blacktiger: Man, you must have eaten something really wrong. Please stop thinking in conspiracies and seeing microsoft as the incarnation of evil.
I think that multitouch devices will be indeed expensive, but the price will drop once they become more widely available. That however depends on how easy multi touch actually is and how bad people want to have such a device.