The biggest upgrade to 4K Blu-ray isn’t the picture quality

I love physical media, and I have a large collection of both Blu-ray and 4K Blu-ray discs. Both of these are fantastic formats, but I’d give the edge to 4K. Not only is there a resolution boost, but you also get access to HDR that helps colors pop off the screen. Those are two big advantages that 4K has over Blu-ray, but I wouldn’t even say it’s the biggest upgrade.