I couldn't agree more. I have a DVD collection of over 200 movies, I haven't bought a single DVD in like 6 months because I know I am going to want it in Blu-Ray to keep for a long long time. The download model works for rentals, but not for purchase. 200 discs x 25GB per Movie = 5000GB, and then I need another 5000GB for backup in case the Hard Drive takes a dump.
Not going to happen anytime soon. That is what makes Blu-Ray so important, it may very well be the last physical format, thus it will be around for a long long time. Screen resolutions aren't going to change again for a long time, just ask the FCC.
Blu-Ray is the reason to keep the Macbook Pro, Blu-Ray burners on the high end, readers on the low end, and the Macbooks will stay with DVD and integrated graphics, and hopefully a reasonable price tag to grow market share. Maybe a more expensive Macbook with a Blu-ray reader? HDMI out for all.
Mark my words this will the the Christmas of Blu-Ray.