You were @WRONG and I was @RIGHT.
I think 15-20% (although the 15" is 14%) thinner, as I later clarified, is significant.
I never said it shouldn't have a dGPU, but given the thinness, Apples history, Apples priorities, and the fact that it is 'more powerful' could suggest dropping the dGPUs.
In terms of iGPUs, of course they're not as powerful but all Apple needs is a higher TFLOPS number as an excuse for removing a dGPU, for example with the 21.5" iMac.
At the end of the day, I'm extremely glad they continue to use dGPUs... now we'll have to wait for benchmarks.
Yeah your info on the brand new iMacs and the amazing refreshed Mac Pro's was also dead on! You ROCK MAN!