All that great stuff we just heard about iPhone OS 4.0: multitasking, tentpoles, app folders, Game Center, iAd -- okay, maybe you weren't all that excited about iAd -- seem destined to dodge the iPad all the way until the Fall. Instead of finishing with his usual "one more thing" flourish today, Steve Jobs just left a stunned audience with the terse statement that Apple will be "bringing OS 4 to the iPad this Fall." Now, that doesn't necessarily mean that you'll be deprived of all those goodies above. It may be that the Game Center or other features sneak into the iPad ahead of time. But the full-featured OS 4.0 experience? Only on the iPhone 3GS and 3rd gen iPod touch.