Highly recommended is PaidContent's interview with MTV’s games SVP Paul DeGooyer. He's firstly trying to put a brave face on the decline in sales of Rock Star type games - "not as sharp" as we might think, apparently; then he ponders where the future might lay:
“Songs and music games need to be a part of people’s self-expression. Developments in terms of console interfaces are going to make it, literally, more gestural to interact with music.”
Literally more gestural. My self-expression will literally be more gestural. Frankly, I can't wait for the future.
It turns out what he means is that you might not need a crappy plastic guitar shaped thing. In effect, he's picturing an air guitar which makes a noise.