Maybe we need to look towards the DS for inspiration. At the beginning, the touch aspect was heavily promoted and a lot of games came out with only touch controls, that worked mostly well. On the other hand, the DS has one very important feature - a stylus with a sharp point. Even if you do get a stylus for your phone, most have very wide ends, nothing like the precise pen that came with the DS. I sometimes wonder whether if mobile phones had all come with styluses, we'd have better games.