What is it?
Every title listed on Blu-Ray.com (which is pretty comprehensive in terms of major US distributors, as far as I can tell anyway).
Why is this interesting?
This story is best told in quasi-screenplay format:
Narrator: Once upon a time there was a VHS collection and a librarian interested in a collection wide format upgrade.
[fade in, Librarian at computer]
Librarian: Shit, that sounds like a lot of manual data entry, how am I going to find the time to do this?
[enter stage right, Needlebase]
Librarian: Oh hey, I could just grab the title info from this website and run some FileMaker wizardry.
*clock ticking sound*
Librarian: Well that was easy.
Where is it going in the future?
Well, I guess that depends on who you consider the real winner of the Blu-Ray vs. HD-DVD battle. Some would say streaming won.