This new feature allows the latest chipsets to recreate lighting and color, just as they were thought by movie makers. In practice, this is due to the inclusion of additional frame-by-frame metadata that is read out later by the chipsets, before the image is reproduced by television sets.
At this time none of the companies revealed exactly which televisions will receive this new update.
At this time there are not many contents compatible with this standard yet. However, content providers such as Amazon have already started making HDR10 + support available on the Amazon Prime Video HDR.