Perhaps possibilities just recently came possible with UWP on XBox and the new HLS support for fragmented MP4 (fMP4). This then puts the fragmented MP4 approach as equivalent with HLS and DASH with only some administrative protocol overhead around them differing.
writes that the UWP apis on XBox will support the fMP4 container and h.265 within it. The support for ac-3, eac-3, and aac continues. DASH rather than HLS is also supported.
https://tools.ietf.org/html/draft-pantos-http-live-streaming-20#section-3.3
https://developer.apple.com/videos/play/wwdc2016/504/
HLS also supports the fMP4 method (the older m2ts also remains). Apple announced fMP4 middle of 2016 and it is being deployed to their OS upgrades.
