Based on two or three reports, it does appear the technical details of HDMI 2.0 have been agreed by the HDMI forum technical working group, but the new standard has not yet been officially announced nor released. I've signed up for a web seminar about HMDI 2.0 scheduled for Aug. 28, so maybe there will be some answers coming soon at to its capabilities. The next generation of Blu-ray is a different story as the spec. is not expected to be complete before very late this year or early in 2014. I really do expect to see support for up to 4-layer discs as well as 2-layer discs (with up to 66 GB capacity on the 2-layer discs), as many BD drives already support these capabilities as part of the BD-XL standard.
As for the audio we'll have to wait and see what the new BD standard supports. In any case, once we go beyond 7.1 channels, at least in the long term, I don't really see BDs needing to settle for bandwidth hungry uncompressed PCM. Rather, a lossless compression scheme would offer the same audio quality and require less storage space on the disc (same reasons why the studios prefer to use DTS HD-MA or Dolby TrueHD instead of PCM when you are talking about 5.1 or 7.1 audio channels).
3.2.1 Unique capabilities
The patented Auro-3D Octopus codec is unique in its capability to mix different audio-channels into one
channel and ʻunmixʼ the original separate channels in the decoder at their original audio quality and with
100% channel separation. What this means is that the codec can take different (up to 3) playback formats and
mix/encode them into a PCM-stream with a lower number of channels and un-mix/decode the correct
playback format for the used playback system, without the use of dematrixing techniques as used by most
Certainly would prefer more bandwidth be applied to the video with the compressed lossless codecs ; this seems to be what they have in mind - at least in the short term as you say.
- a 7.1 and 5.1 surround sound mix merged into one Auro-encoded 5.1 PCM-stream (for BD and Digital
Haven't had a close look at dolby atmos requirements ; hope it's compressed for everyones sake:) ]