I know the 4K offering is the right one, question is if I'd get anything from switching to the ATD in the meanwhile? If I bought an ATD it could replace my ACD until the 4K version came out,. And, as it probably won't match the new 4K one, it would be shortlived anyway.
So, any technical reason to pick an ATD over the ACD?
If you are not dying for ports or a speaker/webcam, your current one is going to be the exactly the same.
Not sure what you think is "aging" about the display. LED backlight, should be good until the rapture. Whereas I have two ACDs with backlights that get warmer every day.
If you are just bored with your 27" ACD, you won't see a display difference with the ATD.
Unless you want to eat the loss that comes with selling and trading up, your 27" can just be one of your 6 monitors that your nMP can push pixels to.
EDIT: I just looked at the specs of the
27" Cinema Display. You should have webcam and speaker support right now. If that is what you're upgrading from, you'd be getting a basic spec bump only, and a thunderbolt passthrough, and some convenience.
In which case you'd be upgrading to future proof only. But you'd also be buying a model that hasn't been refreshed in some time.
Assume that any new display will have TB2 as well, which the ATD does not. You won't want it to be a bottleneck.
Tough call, but waiting seems wise.