If I had to guess, I'd say this will be the launch of Apple's cloud service. Coming right on the tails of Google I/O, it should take the spotlight from Google

If I had to guess, I'd say this will be the launch of Apple's cloud service. Coming right on the tails of Google I/O, it should take the spotlight from Google Music(what little it has). Also, this early announcement will allow developers to come to WWDC with some background on the service. Actually, if I was a betting man, I'd say nothing is going to happen at all :)