Unified Memory and DDR4 RAM aren't equal. These new Macs aren't using the standard RAM modules that the rest of the industry is using. The unified memory allows the GPU and CPU to quickly exchange data and eliminates the bottle neck we used to have when CPU's and GPU's needed to pass information back and forth.This brings one interesting thing about these new iMacs - their prices. I know it’s been said many times, but the fact that Apple is offering a 256/8 configuration for $1250 is just absurd. I’ve seen phones with more memory. Or let me put it this way - the money they ask for upgrading these is sick, especially now when nothing in these devices is user-upgradable. It’s just ridiculous.
And before someone says “if you don’t like it don’t buy it” - I’d love to buy one, but I’m not gonna pay 2x more just because I want a 16/1024 configuration.