So the late 2015 27 iMac will support H265/HEVC acceleration(see 29:48 in the keynote) with High Sierra. Both Skylake and the AMD Radeon R9 support hardware accelerated decoding (playback). I'm wondering if this also means accelerated encoding on these computers (I think it does) and whether iTunes will deliver 4K movies encoded in h265 for us in the fall? Discussion and shared knowledge appreciated