Nice red herring. As mentioned, Sony gets a royalty for the blue laser design, not the "box with a tray" design. And that, in a nutshell hilights the difference between a valid patent (specific laser design) and a generic design feature (box; rectangle with rounded edges, etc.).
It's like you've never heard of a design patent, which covers the ornamental design of an object. They've been around for well over a century and that most countries have patents or other laws of this type. They are valid patents regardless of what armchair lawyers on online forums may say or believe.
Most people also have a terrible misunderstanding of design patents or attempt to make gross simplifications (e.g. "They're just trying to patent round corners.") in order to somehow dismiss the issue. If people can't even be bothered to understand how design patents work or just refuse to accept that their legal existence is valid, it's impossible to have a meaningful conversation. And then whenever a court ruling goes against Samsung, they work themselves up into a froth and start calling the judge an idiot or obviously on the take.