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I'm sure it will be supported. Not to mention like other poster said it was demoed on the 4. The 4 has enough horsepower to get updates likely at least til iOS 6 rolls out, maybe beyond. What's funny is I have the thunderbolt and atrix, an my iPhone 4, with less ram than both, and a slower clock speed runs about as fast as atrix, and a fast, or faster than the bolt. Apple got it right with the 4, with exception of the antenna issue( I habent had any, likely att service doesn't help) and the occasional home button. I'm running 5b4 on my iPhone and it runs great. They did a good job so far