If I had to guess, I'd say that they moved the date so they could closely follow Apple's WWDC conference instead of happening a month before it as it has in the past.
That way a) they can get the last-word press-wise and b) the can make last minute decisions about what to announce depending on what Apple announces at WWDC -- perhaps even pre-announce vaporware to counter Apple's surprise announcement. :-) It looks like IO will follow WWDC by 12 days this year if the WWDC date speculation is correct.
That way a) they can get the last-word press-wise and b) the can make last minute decisions about what to announce depending on what Apple announces at WWDC -- perhaps even pre-announce vaporware to counter Apple's surprise announcement. :-) It looks like IO will follow WWDC by 12 days this year if the WWDC date speculation is correct.