I don't know if anyone has noticed, but the the custom build iMac no longer has the option to change the CPU or GPU on Apple website. The only non-retina iMac sold is the one with the 3.2 i5 and the GeForce 755M with no CPU or GPU upgrade options.
This means that either they are planning an update to the non-retina model or that they will simply stop selling the high-end non-retina iMacs (like they did with MacBook Pros). I'm guessing it's the latter.
This means that either they are planning an update to the non-retina model or that they will simply stop selling the high-end non-retina iMacs (like they did with MacBook Pros). I'm guessing it's the latter.