Isn't that the very definition of the general public? The majority of people can't be bothered to pay for/and or connect an HD source to their HDTVs but you think they care about bit rates and quality and BD? The majority of people also hate returning movies, hate late fees, and also hate waiting for movies to arrive by mail. They want their content NOW and they want it cheap. Usability is fine for the millions of people streaming Netflix on gaming consoles and is improving with every generation of devices and Internet connected TVs. Streaming isn't going to take anywhere near 10 years to be "accepted" by the general public. I'd be surprised if it took 5. Just ask Netflix.
Back on topic, BD is overpriced and basically only appeals to OCD physical disc hoarders. I have appreciated the quality but won't pay the premium to view them. After a few minutes into a movie, I don't care how it looks anymore if it's reasonably clear. It's called immersion. Streaming and upconverted DVDs provided plenty of it on our 55" and 32" HDTVs.