Apple rumored to unveil new iMacs soon.
Apple will hold the iPhone 5 event on September 12th. Besides the iPhone 5 we have seen reports that Apple will also unveil new iPods. Fox News reports that Apple will release new iMacs soon. It could happen before the October iPad mini announcement. I do not think Apple will unveil the new iMacs at the iPhone 5 event.
If these new iMacs will have a Retina display like the new MacBook Pro is not clear. It could be just a minor performance update offering state of the art CPU and SSD drives.