Speaking of the upcoming Guitar Hero IV, IGN quotes Activision CEO Bobby Kotick as stating: "It's not just about guitars. We'll include a lot of other instruments, vocals. It will help us expand internationally. It's the first game we've had in which we can use local content and local bands."
Whereas Guitar Hero has top date used solely Red Octane’s superb guitar peripheral, Rock Band adds drums, a second guitar and a microphone to the mix.