Perhaps the reason Apple seems to be the only one dragging its feet on developing the run-away popularity of gaming on the iPhone and iPod Touch is because, as some suspected, Apple doesn't really like the idea of their Juggernaut mobile devices becoming dominant platforms for mobile video gaming.
Over time, subtle hints are being dropped by those working closely with Apple that the folks in Cupertino are becoming increasingly more irritated by the references to Apple's iPhone/iPhone as popular gaming systems.