The display needs to support HDMI 2.0a and HDCP2.2 to fully support Dolby Vision and the competing HDR High Dynamic Range format.

I concur that the ability to show HDR content and 10 bit colour depth, and hopefully true DCI colour space, will make a far bigger difference to picture quality than the increased resolution of 4K.

Tests have shown that displaying HDR content with 10 bit colour and DCI, at resolutions of only 720P, give a superior picture to standard 1080P Bluray.

All the streamed 4K video is heavily compressed, though much better with the new H265 compression. So compressed that i prefer 1080P Bluray at much higher H264 bit rates of around 29mbps.

The new Ultra HD Bluray discs also of course support Dolby Atmos/DTS:X, so next question is what will the new version/replacement of the HD621 do with this audio. Will it decode it to 7.1.4 channel PCM and feed to the new 861 (v10?) which may support the extra height channels....??


861v4 LPSU, HD621, Sony HW40, PMC AML2, PMC IB2SA Centre - Triamped via Wyred4Sound MMC, PMC Wafer2 surr, PMC SB100 Sub & Wyred4Sound SX-1000, Dune HD MAX. Oppo BDP-105D Signature. Mede8ER 600X3D
Marantz CD94/CDA94. Rotel RB-1562, LG 65" OLED. IPL Acoustics STL5. Virgin Tivo. HifiMan HE-1000/Audio-GD M9. Stax SR-007/KGSSHV Carbon‏.