Its similar to but not quite the same as the jump from 8 bit color and 16 bit color. White is white and black is black but you'll get more color precision in b

Its similar to but not quite the same as the jump from 8 bit color and 16 bit color. White is white and black is black but you'll get more color precision in between. Gradients will have less color banding because of less rounding and color aliasing. Its a bit different because of some of the intricacies of how the new formats are represented. The range is indeed dynamic and that can be exploited to get more precision in a smaller range. However, calling it HDR is (imo almost purposfully) confusing because of HDR photography which has a lot of other concepts as well as hardware vendors promising the moon. TV vendors also like to conflate it with brightness or accuracy which are goals for any TV, HDR or not. Brighter whites and blacker blacks is what you are promised but I think its better to think of it as less crushing (greys getting rounded to white and black).