Please show me a device that's comparable to the new Mac Pro... So much performance in this small of a form factor is pretty innovative
What you're really paying for is a very expensive and moderately beefy machine that can run OS X legally. Or you need Final Cut Pro in some serious capacity. Oh, and it has an Apple logo on it.
With these Mac Pros, I don't think people who buy them are necessarily concerned about specs or cost-effectiveness. I think they are enthusiasts that need Mac OS, and find the Macbook Pro or iMac underpowered.
They're premium computers that aren't the highest end specs, but have a pretty good set of specs for the size and noise especially and can be serviced quickly at apple stores across the country pretty easily.