Is HDR10+ or HDR10+ ADVANCED limited to 5,000 nits?

No. The specifications for both HDR10+ and HDR10+ ADVANCED support a maximum peak brightness of up to 10,000 nits. However few current high-end displays are capable of achieving 5,000 nits or more.

The base HDR10+ standard is also frame or scene based, fully scalable and can reproduce the full BT.2100 PQ curve, ensuring compatibility with even brighter displays in the future.