Besides market issues, it is just really hard to make a very sophisticated game on a touchscreen. The controls are inherently imprecise and require you to cover

Besides market issues, it is just really hard to make a very sophisticated game on a touchscreen. The controls are inherently imprecise and require you to cover up a third of the screen anytime you're interacting. The SNES game landscape would have looked very different if it had a control scheme with those properties. The popular sorts of games for mobile are the sorts of games that actually work well with the limitations of the phone hardware.