MultiTouch Ltd has been at this IR-based multitouch thing since 2007 and it's hit CES in force this week. Sure, the current 46-inch model requires 12 inches of depth -- in order to provide sufficient space for the infrared cameras embedded in its back to capture the whole, ahem, surface -- but having unlimited touch inputs is always a wildly impressive sight. We put one of the displays to the test by exploiting a nearby crowd and slapping down a good 40+ fingers on it, all of which were recognized. To be perfectly fair, the IR cameras don't seem to have a very flat recognition area and many of
