The Only studios that ive heard supporting Blu-Ray-- were the studio Sony owns (Columbia/Tri Star pictures, Screen Gems, and 40% of MGM). Disney have somewhat said their supporting Blu-Ray, but it still seems they are thinking about it, and you know Disney owns quite alot of movie studios. The rest of Movie studios have yet to actually pick sides but some such as Universal, Warner Bros and Paramont have released HD-DVD movies.
And even though mostly every Electronic hardware is behind Sony, HD-DVD has its large amount of support as well-- its being supported by Dell, HP, Microsoft, and many other Electronics.
Either way, this is all confusing for me. I wish i had no intentions on investing in either one until this format war reaches a conclusion-- I don't want to end up with something that's the equivalent of a laser disc. Each format has it advantages and disadvantages. HD-DVD is relatively inexpensive and came out before Blu-Ray hit the market but the studio support is lacking. Blu-Ray has massive studio support from what I understand and it won't hurt the format that it is going to be included on the PS3 but it is coming out later than HD-DVD (and still continues to be pushed back) and is somewhat expensive.
Im begining to think that casual movie watchers will be deterred from buying a Blu-Ray player due to it's cost, so i think HD-DVD will win that market. Gamers will likely opt for Blu-Ray due to its inclusion in the PS3, so Blu-Ray wins that market. Movie buffs will likely buy Blu-Ray because of the studio support that it has (although that's somewhat shaky, the studios could release both formats simply because it means more money for them), so I think Blu-Ray will pull away there....meh i dont know, my view on who will come out on top are kinda going back and forth right now.