Basically, since its initial launch, one of the most annoying things about the iPod (and now iPhone, iPad, etc) is that you have to plug it into your computer via USB to sync it. Sure, this also allows you to recharge your device, but I’d love to say, charge it in a holder next to my bed (since I also use it as an alarm) and wirelessly sync it over WiFi. A new app allows you to do that. Too bad it’s likely to be rejected.
As you can see in the video below, WiFi Sync allows you to do exactly what the name promises. Once you complete a few steps to authenticate your iPod/iPhone and then your computer, you can begin syncing wirelessly. It just works. The problem, of course, that Apple is likely to have with it is unauthorized interaction with their software, iTunes.
Undoubtedly, if Apple wanted to include such a feature in iPod touches/iPhones/iPads they would have already. It would seem that technology isn’t an issue, but there may be other things at play, such as security, and speed. While security is debatable, speed is definitely a big plus for using USB (2.0) versus WiFi as one transfers data at nearly 500 Mbps, while the other would transfer data at just a fraction of that. (Obviously it would vary based on technology — 802.11n versus 802.11g, etc — and distance from the router.)
Something else to think about: when Apple inevitably does move iTunes to the cloud, syncing their devices wirelessly will be pretty much a necessity. Perhaps Apple is just waiting for that and enjoying the big USB bandwidth until then.