"... This year's Consumer Electronics Show saw the unveiling of the first ready-for-primetime music game that involves real instruments, rather than plastic ones. We captured some footage of Disney Star Guitarist so you can see how the game is played..."

From http://blog.wired.com/gadgets/2009/01/finally-a-guita.html and http://digg.com/pc_games/Video%3A_A_Guitar_Hero-ic_Game_for_Real_Guitar ...