HDR televisions have a screen with a 10-bit color depth. This means that these TVs show up to 1 billion colors. This is much more than the 17 million colors that an 8-bit television displays. As a result, you can see many subtle color differences and images look realistic on a 10-bit TV. If you want to get the most out of a 10-bit screen, you do need HDR content. You'll find this on many Blu-rays, some games for newer game consoles, and the most popular streaming apps such as Netflix, Amazon Prime Video, and Disney+.