iMac (and Mini) need more RAM before adding this kind of stuff
I hope Apple is ready to redesign the logic board to allow iMacs and Mac Minis to hold 64GBs of RAM. Granted not every market is the same, but in the music industry (at least my part of it), a 32GB Mac/PC is being pushed to it's limits 24/7. We all use 64GBs and 128GBs. And I hope Apple doesn't make me buy that screen just to get the 64GB iMac.
Well, obviously I'm a Mac Pro user, but I could REALLY make use of some cheaper iMacs or Minis for a host/slave setup, but they must have 64GBs or it's not worth the money to me.
My point is, don't make an incredible retina iMac and neuter it due to lack of RAM. The iMacs/Minis should both be at 32GBs and pushing 64GBs. They are behind in that respect, all others, amazing. I would have bought many Minis by now if only 32GB models were available.