Yes, streaming is simple. But streaming isn't owning, and a lot of folks seem to want to own specific titles so they can watch them anytime they want.
I totally agree that streaming is simple and movies downloaded stored locally keep content available to watch at anytime you want. But I have to disagree about the owning part. Physical media is the only way you can own a copy of a movie as you can sell it or you can leave it in a will to a family member or friend. With a digital version of a film as I understand it no one actually owns that copy when purchased. Anyone that purchases the digital version is actually purchasing a viewing license and when you die your license dies with you. You can not legally give it to anyone nor can you leave it in a will.
Now on a different note, I just found out how to get video and music content to my home theater system but music is hit and miss as some songs play and some do not. I am just right clicking on a file and choosing cast to device. I downloaded two movies on Vudu and I could not access the file or copy it to another hard drive to try and play it on my home theater set up. I think that even if I could afford a NAS set up and tried having downloaded content I honestly would still prefer physical media, will leave it at that. The internet connection I have now is 150 mbps up and down so I can download full movies in very little time. Right now even if I wanted to try and and check it out income is so bad I have to put what little I do get extra into getting a few movies here and there and I want to upgrade my Pioneer Elite SC-05 receiver to a new Marantz SR-7011 and upgrade my Samsung 4K UHD to a Oppo 4K UHD player. I want 4K switching and Dolby Atmos/DTS-X so any thoughts of a NAS would have to wait as it isn't on my priority list. If I ever started to purchase digital downloads I would still have same requirements that being 1080p minimum but focusing on 4K UHD for video and lossless only audio, no dolby digital plus for purchasing titles. Dolby Digital Plus is the minimum that I would like to get for streaming/renting.
I will have to stop by some day and check out your home theater bigshot