For those who haven't watched the video, AMD's upcoming Ryzen desktop CPUs (Q1 2017) running on the AM4 socket with DDR4 RAM will be outperforming the top Intel offerings at a significantly lower price. So hold off your purchases.
Yeah, so that, as usual, turned out to be quite misleading. Yes, the Ryzen 7 1800X about matches Core i7 6900K at half the price. But that's a fairly narrow niche to compete on. If you are made of money, and simply going for performance, Intel definitely has chips that outperform any of the Ryzens.
On a more practical side, in the actual category of under-$500, Ryzen achieves superiority purely by core count. On a single-core comparison, i7 7700K blows even 1800X completely out of the water, never mind the Ryzen 7 1700 that it's priced to compete with. And while modern applications have been getting better at utilizing cores, even saturating 7700K's 8 virtual cores is tough. So most of the performance bottlenecks are going to be due to single-core performance, where 7700K outperforms 1700 by about a quarter.
So the bottom line is, if you're trying to throw money at a custom build for maximum power, your best choice is still Intel. Perhaps, with something like 6950K. If you're trying to build a balanced high-end gaming PC on a sane budget, your best choice is still Intel with the completely unbeatable performance of 7700K.
The only situation in which you should be reconsidering going with Intel right now and opting for an AMD Ryzen instead is if your primary use is going to be rendering. This is the only common consumer application for which you actually want 16 virtual cores for maximum performance. Everything else is either highly specialized and you probably want to run it on GPU or a cloud anyways, or is going to be handled better by a 7700K.
But yes, if you're, say, an animator and expect hours upon hours of rendering, go get yourself a Ryzen. It's a good deal.
P.S. Here are some benchmarks