'Mid 2014' 27-Inch iMac Also Referenced on Apple Support Page
Following yesterday's spotting of an unreleased "Mac mini (Mid 2014)" on an Apple support page, French site Consomac noticed [Google Translate, via MacPlus] another entry on the same page mentioning a Mid 2014 27-inch iMac model. Both the Mac mini and iMac entries have since been removed from the page, although they are still visible on a cached version of the page from yesterday.
While the Mac mini entry has been taken as a hint that an upgrade may be imminent, especially since the machine has not been updated since October 2012, the iMac entry may point more towards the inclusions being an error. With the new low-end iMac having been added just last month, it seems unlikely that further iMac updates will occur in the near future.
It is possible Apple may have planned for a broader iMac update in the middle of the year with the low-end model appearing as part of that refresh, but the company may have changed plans due to a lack of chip availability or other factors. Alternatively, it may simply be an error unrelated to Apple's product launch plans.