H265 was just released as standard couple of months ago. We are years from good hardware decoders/encoders, and good software decoders/encoders. Not to mention support in content creation tool chains.
Comparing to H264 do make sense. It show that H264 can be phased out as there is something much better. But for deciding which to choose instead, H265 should also be compared.
And not only on one frame.