Optical media give studio broadcast quality pictures and sound, but sadly, many people will sacrifice a bit of quality to have their content streamed, or via Sky etc. It's more convenient and cheaper. I think this is the reason the optical format will die out fairly soon, even if there are many more titles out there every day. It's the same with SACD and DVD Audio. Many people settle for CD quality and don't want to invest in the hardware and still very expensive discs. I stream music and would do the same if I had a TV. My broadband is quick enough to watch stuff over WIFI and even though it's great quality, streaming always involves some sort of compression and can't compete with a 'fixed' perfect quality film on a 4k disc. The sound quality in particular, on Blu ray discs is incredible, but most people don't want the cost and clutter of a surround system, so much of this quality is never realised. I think 95% of people into TV, videos, film, music etc. don't really care about the quality available with Blu Ray and especially 4k, even though all TVs are now this resolution.