Unity 3D Game Engine coming to iPhone

This is definitely very interesting: Unity is Coming to iPhone

iPhone's gaming capability rival's some portable gaming devices, and with the release of a 3D engine will only mean tons of different games on the iPhone. My only concern with iPhone gaming is that the controls aren't all that great. You can't really do much with the home button, and using "soft" controls (controls that are drawn on the screen) aren't very responsive.

Then there is the problem with battery usage. If you run some of the OpenGL ES samples on the iPhone for a while, your battery will start draining quickly.

Unfortunately even though the iPhone has all this capability I doubt it will have more than a "casual gamer" audience.

Rumors are that Apple will release a 3G version of the iPhone in June. This new iPhone will probably have a better battery, but I doubt it will be enough to play games and use the phone without recharging every 30 minutes.