When streaming services can deliver 1080P at 25mbits/sec, sign me up. Most "HD" streaming services I have seen are fairly horrendous. Either they are streaming at reduced resolutions such as 720P or the data rate is poor enough that there are bad artifacts in high motion scenes and transitions. When you have a projector and a large screen, this is a major problem. You see it all. With Blu Ray, there are no artifacts it feels like you're in a theater.
Also, outside of big cities, most of us are on fairly slow 1.5 to 5mbit/sec connections. The local cable provider recently got a fiber backbone in town which greatly increased their offerings (pulling about 18mbits / sec at home right now) but I am moving and the new neighborhood is back to the slowboat offerings. The duopoly is slow to catch up, they need a concrete competitor before they will make any improvements to their infrastructure. It was only when the cable service started offering internet that the phone company (AT&T) finally started offering DSL in the area.