And before people's expectations get too out of whack (too late!), let's remember that although Ryzen will be a massive step up for AMD CPUs, Sky/Kaby Lake will
likely still be juuuuuust a little faster for games that aren't heavily multi-threaded. Not by a huge margin mind you, and I'm sure there will be plenty of benchmarks where they're neck-and-neck. But enough where if you mostly just care about games on your computer, and already have an overclocked i7 6700k/7700k, you probably won't gain a ton by switching over right now. Other than a smug satisfaction of sticking it to Intel and promoting competition I suppose
At the bare minimum this should push down the price of Intel's CPUs to more reasonable levels, and it will be a huge boon for content creators that have been stuck with Intel's price gouging for years. Plus going forward as more and more games lean into multiple cores to extract full performance, 6 and 8 core CPUs will start to outstrip older chips with fewer physical cores (which is already starting to happen, but only in a few select games).
Here's hoping those Ryzen gaming benchmarks live up to the hype!