A touchscreen subnotebook/tablet/superPDA/superPod would be killer. Wireless USB, WiFi, Bluetooth, no modem, no optical drive, suuuuuuuuuuper thin, no keyboard. It could even act as a Mac mini / Mac DVR remote. OK, it's a fantasy.
Maybe TWO models shown at MWSF: the mini/DVR/homeTheater thingy and the iBooks. PowerBooks announced but not shipping yet.