Maybe I'm a sheep but I think it's great. Up to 128GB ECC, up to 18 cores, large NVMe SSDs with up to 3GB/s speeds (likely reads, but probably also writes), and it's in that beautiful grey / black. Really cool. The 8-core model at 5k seems reasonable to me since the monitor is likely 2k itself.

You'll probably see a lot of them being bought for upper eschelon developers at hip startups. And the TCO of a mac vs. a beige box PC is said to be much lower by way of lower incidents of issues, failures, etc.

Edit: the one processor e5 16xx chip is less than a grand. That changes the value proposition of the iMac pro but if I had the cash I'd still get one.