I'd like to see OBS support more HDR aware workflows. I think we'd need to make sure the whole composition pipeline is color space, luminance, and high precision source format aware. Color spaces are pretty hard to work with in the current state of things imo. For PC HDR support, that means supporting HDR10. We'd have to tone map everything for streaming purposes, which happens transparently right now. Since a lot of games released this year support HDR, it's becoming more important.