You're comparing an insanely popular mobile phone and a general-purpose computing platform to an Xbox. While they are both mobile devices and both can play games, neither is really mobile gaming hardware per se. I mean, you're obviously not wrong that making the iPhone is good business, but iPhone owners are not primarily gamers -- not even casual ones -- so counting every iPhone sold as a "game hardware" sale at this point is pretty misleading.
Most importantly to the point at hand, there is no evidence that iPhone is stealing many sales from Xbox and PS3, nor that it will start in the foreseeable future. I very, very much doubt that many people find themselves wondering whether to get an iPhone or an Xbox to play games on.
Most importantly to the point at hand, there is no evidence that iPhone is stealing many sales from Xbox and PS3, nor that it will start in the foreseeable future. I very, very much doubt that many people find themselves wondering whether to get an iPhone or an Xbox to play games on.