Why would Apple's first 21"/27" Retina display be packaged in an iMac? iMac is a consumer product. Most consumers flat out don't need it. Some want it for the same reason they want more pixels in their camera sensors (more is better, right?). Yet many of those pixel-hungry photographers publish their finished work as JPGs at web-friendly resolutions, tossing away millions of pixels in the process. A price tag $1,000 higher than those great-looking regular iMacs will be enough to sober and deter most (though not all) pixel- and status-hungry consumers.
The right target market for Apple's first large-format Retina display is the buyers of Mac Pros (whether they're pros or deep-pockets consumers). Those new Mac Pros with dual GPUs (and no display). People working closer to the cutting edge of media production (4K). People who have a business justification (and budget) to pay for the stuff. The number of units required to serve that market is much small than the quantity that would be required for iMac production, which means the display manufacturers don't have to ramp-up to high-yield quantities overnight.
Repeat after me... Apple Retina Thunderbolt Display (or Apple Retina Cinema Display).
I'm with the predictions of 2015 for a Retina iMac (at the earliest). If the predictions of 55" and 65" 4K Apple TVs for fall of 2014 are on target, then Retina Thunderbolt Display by then, too. iMac a year or two later.
The right target market for Apple's first large-format Retina display is the buyers of Mac Pros (whether they're pros or deep-pockets consumers). Those new Mac Pros with dual GPUs (and no display). People working closer to the cutting edge of media production (4K). People who have a business justification (and budget) to pay for the stuff. The number of units required to serve that market is much small than the quantity that would be required for iMac production, which means the display manufacturers don't have to ramp-up to high-yield quantities overnight.
Repeat after me... Apple Retina Thunderbolt Display (or Apple Retina Cinema Display).
I'm with the predictions of 2015 for a Retina iMac (at the earliest). If the predictions of 55" and 65" 4K Apple TVs for fall of 2014 are on target, then Retina Thunderbolt Display by then, too. iMac a year or two later.