Visual light intensity is measured in nits (no, not the itch-inducing kind), and for a TV to be HDR-equipped it has to pack a pretty hefty number of nits indeed. Most current HD tellies have a nit number of around 400. HDR TVs? The best of the bunch deliver in excess of 1000 nits. What does that mean for the next TV you take home? Scenes will look dazzling. They won't simply burn your retinae, so much as produce pictures that truly pop with luminosity: lights will be truly bright, and outdoor scenes should be suitably stunning.