That's definitely a good point. I've played some awesome mobile games.
The only downside is that they are producing for a platform with such a horrendously inaccurate/crappy input system. I get enthusiastic about downloading a game on my n7 only to find that it's extremely frustrating to play, or that the game has been dumbed down in some way to compensate, massive sadface. This isn't true of all of them, especially games that are designed around the touch interface, but after a while I still get bothered by it.
I'm really liking the resurgence of indie PC games, though. In the past few years I've played games produced by < 3 independent people that easily rivaled the games people tout as the "best of all time." Specifically, I'm curious why these huge companies want to produce 1 game over X years for tens or hundreds of millions of dollars and still fail to be profitable when they sell millions of copies.
What are some awesome mobile games? The vast majority of the ones I've played have felt extremely shallow, and couldn't hold my attention for very long at all, so I'd love to find a few consistent go-to's for when I'm on a train and don't feel like playing a puzzle game.