3. Every time we want to make advancements in quality, they make you pay again. This last one is my biggest gripe with DVD-->Blu-->FutureThat one I have to give you. Although, if we were talking directly about BD, I already have all the tech and at this point to stream movies, you must buy specialized tech too or at least f*ck around with the tech you already have.
The problem here is that this will continue to be the case for digital copies of movies as well, because of the simple fact that streamable/downloadable copies tend to mimic the quality of currently available physical media. DVD was the physical media, so we got 480p digital files. Bluray is the physical media, so we get 1080p (often just 720p) digital files. This is going to be the case in the future, IMHO. Which means each time the physical format moves forward, you'll need better PCs, more space, better internet...
As a side note, I personally think that Standalone Upconverting DVD players greatly diminished what could have been a very successful Bluray takeover. By only allowing Bluray players to upconvert DVDs, everyone would've had to dip a toe into Bluray. Combine that with combo-pack only releases, where people would choose to watch the Bluray copy and be wowed...