You still can't beat intel at the high end. Both in terms of heat and performance. If you have a task that doesn't parallelize well, you can't beat intel.
Games are traditionally single threaded and hard to parallelize.
However: you don't need to be the best, you just need to be at the "agreed upon" high end for game requirements, which is the xbox and ps4 (soon to be next gen).
And so, if you're trying to build a "generation proof" gaming PC in a standard sized case, the 3800X is currently your best bet for a new build (or waiting for zen3). If you're trying to do SFF, Intel may be a better choice.
Regardless: AMD's competition has dropped the prices in the "enthusiast" segment. My next build will be AMD, simply because I don't need the best of the best, but rather, good enough.