Nothing particularly earth-shattering out of iRobot this CES. A couple of months after dropping a souped-up Roomba in our laps, the companys ready to do the same for its floor-mopping Scooba. iRobots promising three-times better performance, on the 450, thanks to a 600RPM brush and improved navigation. The company demoed the bot for us ahead of CES in a pretty tight space.