I decided to wait for Zen months ago. I sure hope its worth it. My plan is zen beast for vr gamedev/play (on linux, not windows) Cant VR without the computer to support it, and 90fps keeps the VR discomfort away.
Wait for Zen, but evaluate benchmarks. You can probably still get a cheaper Intel then even if amd doesn't live up to the hype (because at least amd will be closer).