Tablet isn't the only way to do Martini Computing (anytime, any place, anywhere) and I still want to play with OQO or the IBM MetaPad when they get to it, because I think the modular, plug in bits, transportable may be more interesting. You could plug an OQO into a slot in your hifi or your car dashboard or your TV or your desktop PC and get music, maps, photos, video - or a desktop PC. Tablet PC relies more on wireless and even though the USR 22MBps wireless is here, it's not fast enough for treating the PC as a modular component.
But there was one amusing point that struck me. OQO proportions are 4:3:1 - does that sound familiar, if a year late? ;-)