Digitimes is reporting that Apple will launch a new Retina display equipped iMac in October. Their source said Apple is bringing the Retina display to all of its products so this is a natural extension. Apple may use the fall launch of the Iphone 5 as the platform to announce the new iMacs.
Some have even speculated that the rest of the Macbook line (air and pro) may also get a Retina display makeover before holiday shopping starts. This is Apple so we’ll have to wait and see if this turns out to be true.