All this is great but i think we have seen the best we will get, my theory is that GH4 = Cert, but somebody at Activision will say ok how about a new direction, but lets not copy EA`s Rockband lets make even more money by selling everything seperate,

then we get

Drum Hero
Keyboard Hero
Vocal Hero....etc

they will sell a few million units of each to the various punters tastes and with each game suited to each instrument, then we will see some sort of GH5 or Rock Hero game that allows combination of all previous instruments but only sold as complete pack or solus, and as such meaning you would have to buy at least 1 instrument twice, or maybe its just me and my evil empire mind running away?