Yea, consumers don't go for that typically. Most consumers are fine renting some things, but permanent purchase is important. They want to be able to buy a movie and watch it whenever and wherever they choose.. either at home on their tv, or on their laptop in an airplane (no internet connection), or with a portable dvd player, or whatever. As time goes on, portability is becoming more and more important. Which is why this DRM crap is going to end up pissing off a lot of people.
Anyway, a blueray disk has (I believe) 25GB of storage capacity, as opposed to 8GB on a typical movie DVD. The movie is stored at 1080p resolution instead of whatever DVDs are (720×480 (NTSC) or 720×576 (PAL)). 1080p is 1920x1080 resolution, progressive scan. So, technically, somewhere around 2x the resolution of DVD.
But you can get an upsampling DVD player and your DVDs will look better. Plus to see the difference you really need to have an HD tv (preferably one that supports 1080p). The audio I think is also higher quality. On top of that, they're supposed to support greater interactivity (like changing camera angles mid movie) and can hold more extras. However, DVDs have pretty much proven that people buy a movie for the movie, not the extras or additional camera angles or director commentary.
Bleh, sorry for the novel. I guess we could store it on a blue ray.
