iPhone 3GS leads the way for smartphones to pack in power 3D games. With one of the first phones to offer a powerful GPU that actually delivered to its promises of taking mobile gaming to new heights. Will Apple still lead on the path of innovation with iPhone 4th generation as well? Well rumors have it that the upcoming iPhone would pack in an upgraded PowerVR SGX545 chip by Imagination Technologies announced this Friday, that can take the devices’ performance to the next level.