I generally agree. Sure, I have a PS3 and can watch a blue ray, but that has happened precisely five times. The problem, as I see it, is the lack of value.
A blue ray movie tends to cost 50% more than the same film on DVD. The increase in audio and visual fidelity, to be quite honest, rarely actually has a meaningful impact on the film. Worse still, most blue ray movies ship with fewer special features than the equivalent DVD release. I don't know about anyone else, but I don't really think the digital copy is a significant value add.
To be honest, I think Blue Ray as a movie format is a losing venture in the long run. It might stick around awhile longer for games as increased storage capacity is always a nice thing to have but even here you find the media's days are numbered. Eventually, game distribution will rely mostly in digital distribution but until you can guarntee the vast majority of potential players have access to reliable high speed internet (and as games get larger the top speed becomes increasingly important) the disc will always have a place.
I, for example, rarely acquired games through digital distribution simply because, with my old ISP, it could take up to a full day to download a game (it topped out at around 240k/s). Now, with top end speeds around 8,000k/s, I can install a full game in less than an hour meaning it is actually more convenient to get a game this way than it would be to go out to the nearest game retailer, purchase a game, and install it.