I'm not sure what you guys mean by declaring physical media and especially Blu-Ray disks "dead". They seem to be very much alive and kicking - they sell them in any store, electronics or supermarket, as well as online. Sure, there are people who prefer streaming. But there are also people who prefer to play back from a physical source. You might argue that in the future everyone will be streaming, but that future does not seem to be as close as you might want it to be.
Personally, I use Blu-Ray disks all the time. I don't mind them taking up space and if you use them carefully, nothing happens to them. Moreover, for those who like digital, some Blu-Rays come with a digital download, although I have never used that option. One movie occupies roughly 50GB on a Blu-Ray. Meaning about 20 movies on a terabyte hard drive. How many hard drives can one have? Clearly this is a personal preference: some people like having shelves, some people like stacking up hard drives.
Some people might prefer streaming, but for me, streaming has never worked reliably. Moreover, streaming is typically optimized to a geographical location. I live in Germany, but I'm not German and I hate dubbed movies, so I watch movies in English. However, any streaming service - Amazon, Netflix, etc. - carry mostly dubbed stuff, with some significantly smaller selection of titles in original version, that is in English, as most movies and TV shows come from the US. So very often the movie I want to watch is simply not available to stream. But even if it is, the service might suffer from occasional freezing, sometimes it just does not work, sometimes you have to wait, etc. - maybe some of you have a dedicated line, but with usual commercial DSL or cable, you are subject to all kinds of dropouts. If you read your service agreement, you'll see that they do not guarantee you any connection speed, they just provide you service with speeds UP TO some number, which is typically not very high. Finally, even if something is streamed/broadcasted in HD, it does not mean Blu-Ray quality. In fact, I've never seen any service that does it in Blu-Ray quality. Certainly our local cable provider - forget streaming - is limited to a lower quality service.
So, just because there is possibility of keeping things digital, it does not mean that everything else is dead. So if there are UHD TVs it's only logical that they want to sell UHD disks.