You think Rock Band 3 flopped, then just wait until Power Gig: Rise of the Sixstring comes out. Power Gig was created for the music industry and is going to completely, effing tank because no one besides life long guitar players will be able to play the tracks.
For God's sake, Power Gig has Stevie Ray Vaughan's "Couldn't Stand the Weather" as a track. Just imagine how your Guitar Hero player who blasted through "Texas Flood" on expert will react to having to bend actual strings on an actual guitar. He/she will effing hate it and may not get through a quarter of the game before selling it back to GameStop.
Furthermore, here is a preview criticizing Power Gig, mainly for not teaching you how to play before forcing Eric Clapton's "Layla" upon you:
http://arstechnica.com/gaming/reviews/2010/11/power-gig-comes-with-real-guitar-horrid-gameplay.ars
