"Well the first details of the imminent Guitar Hero 4 have begun to trickle out of Activision, stating that Guitar Hero 4 will feature drums and vocals…hmm, this seems familiar. While this is just a rumour it is backed by some reliable sources, including Activision CEO Bobby Kotick. Ok, this sounds like Rock Band, a lot. I mean really, couldn't they have thought of something slightly original - a didgeridoo controller for example? However I think Activision are entitled to copy Rock Band and its peripherals."