Some change is needed. I ran into a wake-up call today with my iPad. The USB 2 ports on a cheapo PC aren't powerful enough to charge the new iPad. I doubt the iPhone would have this trouble, but it is likely to have a battery that needs more juice than the 4S.
There's no good reason NOT to support it since new Macs are now coming with it.
There's no good reason NOT to support it since new Macs are now coming with it.