I am curious what other MacRumors members think about this particular topic. I've seen many posters here and elsewhere clamoring for a refresh to mirror the iMac's slimmer design, as well as USB3 and a retina display. Ignoring any technical difficulties involved in the development and manufacture of such a panel to sufficient yields, I personally started to wonder if the need even exists. Isn't it in a sense already "retina", a non-specific marketing term really, since the usable distance is more than twice as far as from a laptop like the rMBPs? You don't sit as close to the ATD screen as you would to a laptop, so in effect, your perceived dpi is close to (or even exceeds depending on your sitting distance) to that of the rMBPs. For instance, you might use a 15" rMBP at 2880x1800, but sit 10 inches away from it, at a true dpi of 220ish. The ATD has a true dpi of just 109 (2560x1440 at 27"), but if I use it around two feet away, it would seem more "retina" than the rMBP. It's for this reason, besides the issue of cost and technology, that I don't imagine we'll see a retina ATD anytime soon.