Usually I will update for no particular reason, but I have a factory unlocked iPhone (and I deny the carrier update everytime it pops up) and that means "personal hotspot" can finally turn my WIFI-only iPad into a true 3G mobile device!
I kinda figured it was possible to tether the 3G connection from my iPhone to my iPad, so that's the reason I bought a WIFI only device. This was not possible until now (well, until the 11th of March 🙄) so I can't wait to update!