AppleInsider has discovered that the Boot Camp Assistant application included with OS X Mountain Lion contains support for new versions of the Mac Pro and the iMac. Boot Camp Assistant's list of supported Macs includes an IM130 and an MP60. The IM130 is believed to mean the 13th version of the iMac, and MP60 the 6th version of the Mac Pro. Neither model is currently available from Apple.
Screen shot courtesy of Coyote Moon, Inc.
This discovery lends credence to the rumors that Apple will announce a new iMac sometime later this year, and a new Mac Pro sometime in 2013.
What is also interesting is that the new Mac Pro and iMac are in a section of the info.plist file that Boot Camp Assistant uses to indicate which Macs need to use USB booting to complete the Windows install process. The upshot is that neither new Mac will contain an optical drive.
The lack of an optical drive is to be expected. It's pretty clear that Apple would rather see the optical drive go away than continue to support the technology. With most software now available by download, either from the Mac App Store or directly from the developer, the only remaining use for an optical drive is to support DVDs for videos and CDs for music. And both of those are increasingly being replaced with downloadable or cloud-based equivalents.