Remember when movies and TV shows used to come in physical formats? No? Well, before everything was available to stream, we had these discs called Blu-rays, and before that they were DVDs. Sure, they're a step backwards compared to the convenience of streaming we have now, but as 4K becomes the standard of high-definition, your internet bandwidth may not have the chops to keep up. That where the new format of Ultra HD Blu-ray aims to step in.