With H.265 remaining quite a hefty task for systems without hardware decoding support, it’ll be interesting to see just how Apple phases the codec in. My guess is it may be their choice for 4K, leaving HD with H.264 for another few years, until a large majority of Macs and iDevices support HEVC in hardware. (That said, is there genuinely much public demand for 4K? Bear in mind this is the company that killed their 17” laptops, as they weren’t in sufficiently high demand)