Two Hollywood studios who had previously been supporting both Blu-ray and HD DVD high definition disc formats yesterday announced that they’ll support HD DVD exclusively from now on.

The decision was made based on “extensive evaluation” of the current market offerings, plumping for HD DVD because of its “market-ready technology” and lower manufacturing costs.

CEO of Paramount Pictures, Brad Grey, said that this decision by the two studios would bring a critical mass of current box office hits to consumers, with a line-up perfect for HD DVD.

Though no other studio has swapped format, Disney, Twentieth Century Fox, and MGM, all reaffirmed their commitment to Blu-ray, promising many more titles with greater interactivity — something that the format still lags behind HD DVD on thanks to technical limitations of the original Blu-ray specification.