Technically Rock Band stole the drums from Drum Machine, a game in arcades back in the 90's.
Singing games have been around forever, so there is nothing new there.
All Rock Band did was put them together, and not very well. The drums break easily, the guitars are ****ty and the strum bar breaks easily, and the only stable piece seems to be the mic.
It's still fun to play, but I'm looking forward to GH4 and their drum kit, just because it's being made by professionals who actually make electronic drum kits. Much more durable, better bounce off the pads, and it has ****ing cymbal pads. I honestly can't wait.