The thing is, Apple can release them whenever they want to. This next release is going to be their 3rd generation of iPad, so it could be anytime. Maybe they'll release all iDevices refresh during fall and all Macs during summer. If Apple think A6 chips will not be ready until summer of 2012, then they might just do a small refresh, say a 2mp camera and better ppi density this fall or coming spring. There hasn't been any rumors about iPad 3, so personally I don't think it's going to come out this fall.