As we noted earlier this week, next week the Consumer Electronics Show (CES) kicks off in Las Vegas, and it promises to be loaded with new tablet devices–many of them based on Android–seeking to compete with Apple’s iPad. There aren’t many peopie betting on Ubuntu-based tablets to make a big splash at the show, but there are some interesting Ubuntu tablets in development. Perhaps the most interesting one, with a renegade approach to the tablet market, is the Kno Textbook Tablet.