The more control options you want, the more buttons you'll have to festoon the touch screen with, which either means they'll have to be tiny buttons (which will lead to lots of frustrated people) or you'll have a tiny space for the actual game images. Imagine trying to put games like God of War: Chains of Olympus onto the iPhone. They did a good job with Star Wars: The Force Unleashed but the simplicity of the touch screen controls made it disgustingly simple to beat.

For anyone who scoffs at the battery life being the 'only' superior feature of the PSP or DS, that's a big issue for many of us. If I play anything demanding on my iPhone the battery is nearly dead before the end of my commute. That'd never last me long enough for a long bus or plane ride, a wait in a doctors office or the like.

There's also one factor people aren't considering here: brand loyalty. I've been a Nintendo customer all my life and although I don't like every game they put out, I've always found something from them that satisfied me. As an avid gamer nothing on the iPhone has held my interest for very long, but I'm still playing my PSP and DS every day on my way to and from work. The iPhone might conquer the world of cellphone gaming and even take some of the casual gamers away from the DS and PSP, but it's never going to be the dominant power unless it increases in size (allowing for a bigger touch screen) or adds buttons.

Also for year's people have claimed Apple product's are superior perhaps it is just the advertising. IF you like working on stuff/hacking/tweaking running your own programs not just the stuff Apple sells do not buy an Apple product very little 3rd party mod's and things you can do.

It would also be good to see at least a basic level of quality control.