Technology & storage mediums are changing fast enough for me to not bother collecting Blu-ray. By the time I can afford a home theatre system that can fully utilise the higher visual and sound quality of Blu-ray, I think that we'll have movies released on something like USB sticks or purchased online to download. I've seen a lot of Blu-rays already being released as 3-packs to get people used to installing a copy onto a computer... perhaps to have people more willing to download (legally) movies & TV shows instead of buying discs that take up a lot of physical space.
To me it just feels like Blu-ray won't be around for too long, as it will be replaced with a non-disc storage medium... so doesn't inspire me to buy them (needing two different players to watch my movies or buying a new one that can play all of them).