(Replying to PARENT post)
I can understand why Apple is not in a hurry to sell this just as a display. This display could likely not be driven at all by all of their most popular Macs: all the MacBooks and the Mac mini. Maybe it would work with the Mac Pro, but that’s it. And that Mac Pro is probably not the best selling Mac, by a large margin. So they would basically sell this display that only works with a Mac Pro.
I can understand how that might seem like a wasted effort until at least a couple more widely selling Macs support the display. Maybe when the MacBook Pros can do it they will start selling just the display.
With the iMac the advantage is that Apple is delivering it with a computer that definitely can push those pixels, so you dodge all compatibility woes that will plague these high-res displays for a couple more years. It seems like the still had to get in there and do some weird custom stuff and maybe that’s just hard or impossible to do if you have to do it in a display that is hooked up to some random GPU from Apple’s past Macs.
(Replying to PARENT post)
(Replying to PARENT post)
Funny thing, it was also the case for the first 27" imac
(Replying to PARENT post)
In other words, buy a Retina Cinema Display, get the computer to power it for free.
[1]: http://www.maximumpc.com/dells_5k_monitor_pre_reviewed_2014