The upcoming Consumer Electronics Show will likely be dominated more by "ultrabooks" than tablets, though some might say "ultrabooks" are the latest iteration of the notebook form factor and user interface, not a "distinct category" of devices.
That's okay. People clearly are getting used to devices that boot up fast, and a slim notebook that boots fast is a definite improvement. Others would note that "ultrabooks" draw inspiration from the Apple Mac Air, and that's okay as well.
Among the advantages tablets demonstrate to most users is that they boot up fast. CES