Eric Slivka for MacRumors:

Update: Apple PR has reached out and clarified that only the Mac Pro is expected to be next updated in 2013. The company had no comment about the iMac, which perhaps means that the iMac could see updates earlier than next year. It has been 406 days since the iMac last received an update, significantly longer than the traditional iMac update interval.

It’s pretty uncustomary for Apple PR to have to clarify the message this much, but kudos to MacRumors and others (David Pogue, Forbes) for putting together the pieces.

Bottom line is that the Mac Pro seems destined for a major facelift in 2013. As to the iMac, Apple is staying mum. For my money, I suspect that a refresh to the iMac will happen much sooner. An Ivy Bridge update to the iMac seems obvious and inevitable. The question is, what form factors will the iMac be available in? And will it sport a Retina Display, or at least have one as an option or as a specific model?