Question about Warner Bros. & Support for 2 Formats

[OneBigJedi]

I just left the Warner site looking at their HD movies that were on sale and I noticed that there were several movies that were HD-DUD only. If Warner is neutral, for now anyways, what's the deal? They offer at least 18 titles on HD-DUD, and only Rush Hour 3 is Blu-ray only. Here is what I found that is just on HD-DUD:

The Adventures of Robin Hood
Batman Begins
Caddyshack 20th Anniversary
Casablanca SE
Charlie & the Chocolate Factory
Matrix Trilogy
Constantine
Dukes of Hazzard
Excalibur
Forbidden Planet
Grand Prix
Mutiny on the Bounty
No Reservations
The Perfect Storm
Phatom of the Opera
Poseidon
V for Vendetta
Willy Wonka & The Chocolate Factory

If anyone knows a good reply on this, please post. There are about 4 or 5 titles out of that bunch that I would like on Blu-ray. Again, if Warner is neutral, why not release these on Blu-ray as well?