I talked to Mick Garris about Desperation being longer on DVD and he told me that that is not the case. He doesn’t think there will be any substantial differences between the movie that airs and the film on the DVD, except that that DVD will be in widescreen 16:9 format, and without the commercial breaks. And the DVD will also have the 5.1 surround sound track, which really delivers the full orchestral score and sound mix the way it was intended.
There will however be some extra material on the DVD.