It's for people like me. I need something with more power than my current "classic" Mac Pro, preferably with fewer cables and more energy efficient. 2 SSD slots are sufficient for my internal storage needs, especially considering the Nbase-T Ethernet port. Vega-based graphics should be able to properly run the 5K display for the next few years.

I've swapped out a lot of parts in my old Mac Pro, but at this point, I'd rather have something that "just works". And if my needs change, the resale value of this thing will still be good.

But I'm just an iOS developer, doing some multimedia and web stuff as well. Maybe that's not a "pro" by today's definition. :)