Music Talent Competitions

Due to the recent success of vocal talent shows on TV I have wondered if there might be a market for additional musical talent competitions on TV. Granted there is something special about singers and singing groups but what about a show which features other instruments. Could there be one that focused on a certain instrument like the piano or guitar. I wondered if they have thrown around the idea of having a rock band competition with America voting for their favorite new band in the end. These type of shows enable new performers to have instant access to a large crowd and I would bet that there are enough garage bands out there to find enough talent for a show.