It was financial $.
Sales of DVDs were dropping. People were starting to figure out "Shit, if i pay $20 now, in 1 year, i'm gonna have to buy it again in HD!".
Plus movies/tv shows are all taped in HD. And they keep having to downconvert back to SD just to ship to stores. Plus exciting extra footage they shoot, has to be cut out for the SD version. No space.
The quicker they hasten the HD conversion - the faster the boom to start buying up Blu Ray DVDs will begin. Lowering prices for all, and INCREASING profits.
I'm shooting a film this summer: HDV, 720p, 16:9, 1.87:1 ratio. But when it comes to rendering, I have to DOWNCONVERT to SD 720x480. How annoying. Makes me wanna cry. Gotta burn all these SD versions, cuz i know 99% of my market only has DVD players. And when HD is commonplace - I gotta burn BRay versions, and now my SD DVDs becomes an unsellable expense I have to just 'eat'.
Many filmmakers I know are shooting films, and delaying release as long as possible - just so when they release on video - they only have to release Blu Ray versions. Not some ugly SD version. The guy who made Transformers is pissed. The studio forced him to release it on HD, when for months, he was bitching at them that BR was the future. They never listened.
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