The mention that this will be positioned as a Professional APS-C camera is what I hoped for. I think the Pentax K-3 fits this niche as well. If the price is attainable, I look forward to replacing my aged XS.
Pentax bodies are loaded full of tech but lack the stable of lenses Canon or Nikon offer. So I see Pentax users limited to really nerdy brand enthusiasts and I can't blame them -- they make nice bodies. (for perspective: https://www.youtube.com/watch?v=CJ9MsmECULw)
Specifically, pro APS-C shooters are also not likely shooting standard focal lengths as much -- they choose APS-C for length: sports, wildlife, etc. So I'd imagine most pros shooting standard FL have made the jump to FF, but I am sure there's an exception or two out there. But since Pentax lacks a lot of longer FL options, the pro-APS-C scale tips even further in my mind towards Canon / Nikon than Pentax (and Sony).
I'm honestly not being a fanboy here so much as stating a value proposition for shooters. Canon and Nikon have much more glass to offer, so unless other companies offer mindblowingly better bodies, it's wiser to stay in the ecosystem with more lenses.