Then why release anything now? Who is this for, if pros will wait for the "real" one and consumers already have one? Will the "stopgap" model be around/supported in two 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. :)
But then if you're a pro user who buys the thing to make money with, it's probably more tax-effective to keep it 3 or so years then buy something new
It's for people who have a need/desire for "pro" components but also want a thin/portable form factor.