LED is an option to develop, but not sure of its reliability and longevity compared to LCD? Then again if the market in domestic TV's moves rapidly towards LED backlight then commercial interactive screens are sure to follow. Another technology to watch for are the interactive projectors, which Epson have led the way in 2010, but I know are going to see a few rivals appearing soon, and even keener prices. Wouldn't be such a bad idea for the Smart/Promethean domination to be shaken up a bit!