So like all CPUs, it depends on what you're going to use it for in what you'll get for performance.
If your PC is pure gaming, Threadripper is not the CPU you're looking for, i7 or Ryzen and depends on 1080p or UHD+ gaming and your budget.
I'm a little curious on the exotic side, which not even I'll do, a triple Cross-Fire/SLI performs with the PCI-E lanes.
It's still the same issue though, how much is that 2% more worth to you? Not seeing the, "They're blowing them away!" in benches the fanboys are talking about. (All CPUs available now, not just Threadripper)
Glad the waterblock makers have been slow though, reading up that certain games refuse to even work with Threadripper means more research is needed if games I have won't run on it. I do rendering/gaming/video on my machine so Threadripper looks good for the price.
Going to be a kick in the pants for those who preordered it if they have packages that won't work though.
EDIT: LOL, EK has Threadripper blocks up for preorder now.