Is HDR10+ backwards compatible with HDR10? Because if Roku isn't going to use the HDR10+ standard, it would be nice to know.
The reason HDR10 took off so well is because it's a free standard. It's not the best of the 5 competing standards but it's better than not having HDR.
I suppose it might be dependent on the standards built into the TV.
HDR10+ is backwards compatible to HDR10. It is another layer on top of the HDR10 base. All PRIME VIDEO is now HDR10+ encoded, but any device that supports HDR10 only will stream it just fine.