16GB of RAM is certertainlt not plenty for video editing. It's just touching the recommended for Media Conposer and Premiere Pro which are the go to NLE's and it isn't at the recommended if you want to work with 4K.
The GPU's, as you said, are basically nothing for pro work. The CPU is underpowered for heavy rendering. The SSD is impressive, I will agree with that, but no one worth their stuff is editing on the internal which brings forth one of the major problems: Connectivity.
I get that USB-C is the future but it isn't the now. Not being able to connect anything to this system without a pile of extra dongles doesn't make for a pro machine if you ask me.
Maybe this will work for some people. It would probably be plenty for people doing photography (lack of SD card sucks but a lot of pros shoot CF anyway) but for anything greater then web video it's going to be clunky. The OS will feel fantastic and snappy on that SSD but NLE's won't run well.
It's fine that isn't there market for this, I get it, I just wish that they still had a computer that worked for this market. It's supposed to be the Mac Pro but that is a whole other can of worms.