For all iMacs, you choose the CPU version, and there is no GPU choice - it's the GPU that comes with that CPU. There is already integrated graphics for the lower 2 of the 3 21.5" iMacs, discrete for the upper 21.5"iMac, 27" iMac and 27" retina iMac.
Couldn't you see Apple using that TDP headroom to get a CPU with better integrated graphics for the 21.5" iMac lineup?
Couldn't you see Apple using that TDP headroom to get a CPU with better integrated graphics for the 21.5" iMac lineup?