After reading up on AirPlay and it's uses, I have an idea. Using Airplay, how about a wireless sync option of iDevices through WiFi, Bluetooth, or 3G/4G? The uses of this would be phenomenal. Think about it, you have a movie/picture/song/document etc on your home computer that you'd like to have on your iPhone and you're at work. You can log into your home computer (provided it's on) and add/remove whatever you like, just like a tethered sync. Whatcha think, good idea?