I agree that 4K is a tough pill to swallow, hopefully something like this eventually goes down to the ~2K price range, I could probably jump on it then.
If people don't help support it at $4k, it will never reach $2k.
The issue is at 4K I might as well buy a "proper" POWER server from IBM (like the S812LC) for the same price since I don't need a "workstation" form-factor (I've already got some rackmount equipment at home, and my current development system is just a Fedora VM running on my home server).