I like bonus features. A lot. Behind the scenes stuff is great for really good movies. Have yet to see those streamed. Maybe they are? I've never seen it. Plus there's a delay in release and streaming via many online services. Netflix still has many discs only available for disc rental. Contracts get renewed or expire so you have no assurance you'll have access, etc. To be sure you'll be able to stream anything you want you'll have to get Netflix, Amazon VOD, Hulu, HBO Go (?), and whatever else due to exclusivity at like $9.99 or more a month. See where I'm going on this? In the end it'll cost far more plus you still have to pay for the internet connection. More importantly, however, I can't wait to see the US internet infrastructure crash and burn under the load of everyone being forced to stream and then 4K... then 8K, etc. Providers won't spend money as it is. Upgrades to infrastructure? LOL. Yeah. How much will they jack up rates if they do actually do what they should have been doing all along. The US pricing for internet is already ludicrous without raising it.
Ownership of a physical copy is the ONLY way you will ever be able to know that you can watch something whenever you want and that's what is slowly being taken away from us and most people simply just don't seem to care which completely frightens me.