Pro & screen is a great machine. I think that because people are talking about it it is already a success. They will sell a lot, because Ferrari sell a lot, Red cameras sell a lot.
They won't sell one to me, because even though I am a successful indie dev I am clearly not the market they seek. The machines they make for me are - Mac mini, iMac Pro and hopefully the upcoming Macbook Pro, because my barely alive, coating missing from the screen, doesn't hold any charge late 2013 Macbook Pro is still far better than the current brand new one.