Everyone expected Apple to unveil updated models for its entire stable of computers at the 2012 Worldwide Developers Conference (WWDC) earlier this week in California including new iMac desktop computers.

Although Apple consumers were excited about most of the news to come out of the conference including a completely revamped MacBook Pro with Retina Display, the iMac went completely unmentioned

But don't count a new iMac out just yet. After the keynote speech, Apple CEO Tim Cook apparently answered a fan's email regarding rumors about a new iMac, according to MacRumors.

"Our pro customers are really important to us," he wrote. "Don't worry, as we're working on something really great for later next year."

Apple also confirmed the new iMac's release date in 2013, telling The New York Times' David Pogue to look for new high-end iMacs next year.

"Many Apple observers also wonder if Apple thinks that desktop computers are dead, since not a word was said about the iMac and Mac Pro," Pogue wrote. "An executive did assure me, however, that new models and new designs are under way, probably for release in 2013."

Despite this news, a number of iMac users were vocally disappointed by Apple's failure to unveil a new desktop computer model at WWDC. Former Apple employee and current Google engineer Andy Hertzfeld published his thoughts in a public post on Google+ where criticied his formers employers for neglecting their iMac users.

"The next-generation MacBook Pro announced today at WWDC looks fantastic," he wrote. "I ordered one immediately and can't wait to start using it. Unfortunately, the euphoria was negated by my deep disappointment with the meager, lame update that was silently bequeathed to the Mac Pro today."

Apple actually has made a few slight updates to the iMac including new processor chips, but this was only because Intel stopped making the older processors. The iMac currently lags far behind the rest of Apple's laptop models, which now sport USB 3.0 and Thunderbolt ports.

Even though Apple updated the iMac with a few new chips, the processors were the only difference; the iMac did not get USB 3.0, or any more Thunderbolt ports, or any new redesigns. Apparently, the only reason Apple bumped up the specs was that Intel stopped making the older processors.

So when will Apple actually update the iMac? 2012 seems unlikely but don't give up hope.

Based on Apple's pattern of releasing a new or updated product every three months or so the new iMac will likely come out in early 2013. It seems inevitable that this Fall will see the release of a new iPhone to coincide with the confirmed release of the iOS 6 smart-phone operating system. Unless Apple unleashes the a new iMac in time for the 2012 holiday shopping season, the new model won't come out until January or February at the earliest.