Meh. Many gaming benchmarks show much less than 10% difference with SMT enabled/disabled. I don't think there's as much to gain there as people are hoping.
I also take issue with the GPU bottleneck argument. That may be true for average/max FPS, but for the all-important minimum FPS metric we'll likely see Zen destroyed as more in-depth gaming benchmarks come out.
System optimizations, BIOS updates, etc. are only going to get peoples' hopes up. AMD doesn't even really try arguing this point. AMD's main argument is game developers will start coding for Zen moving forward, but it will take at least 1-2 years before the market is semi-saturated with Zen optimized titles.