Ecky :
Existing Skylake CPUs almost certainly have better per-core performance than Zen, and most games don't benefit from more than 4 hardware threads. Those that do, don't benefit from more than 6-8 hardware threads, meaning existing Skylake i7's will almost certainly be better gaming CPUs than Zen will be in a year's time.
Zen's place, if it lives up to expectations, will be in workstations and PCs used for productivity.
Yeah - the quotes got all messed up. Don't know what's going, but the "reply" button kept pulling in text from the wrong post. Sorry about that.
In terms of your post above, while I mostly agree with your expectations, I would say that Zen could well have a place in gaming/productivity cross over rigs. That includes people who stream and edit video, as well as anyone who uses their PC for both heavy lifting tasks as well as gaming.
All a CPU has to do for gaming is be good enough to keep the GPU busy. The reality is that unless you're rocking dual 1080s on a 1440P dispay or something, most Intel i5s and i7s since Sandy Bridge are good enough for most GPU setups in most games. So if Zen can offer a CPU that is effectively good enough for gaming, but offers a genuine 8 core (16 thread) CPU for the heavy lifting tasks at a competitive price, well that all of a sudden becomes an enticing proposition for myself and I suspect many others.
There will be those with high end rigs and 144hz (or higher) displays who want to squeeze every frame they can from their system. For that crowd I think you're right and they'll be better off sticking with an OC'd Intel 7700K or whatever equivalent is released. But IF (and that absolutely is still a big
IF at this stage) AMD can get the single/lightly threaded performance close enough to Intel in a genuine 8 core package they could have a winner on their hands as far as I'm concerned.