One big reason: Blu-ray discs won't play on standard DVD players found in cars, computers and bedrooms.
Now Hollywood - which is banking on the pricier Blu-ray discs to help lift sagging home video sales - is stepping up its efforts to win customers. Studios are packaging Blu-ray discs with regular versions on DVDs, and throwing in so-called "digital copies," which can play on computers and iPods.
Over the past month or so, "Up," ''Harry Potter and the Half-Blood Prince" and many other hit movies were released in such combo packs. Universal is releasing its "Bourne" movies on "flipper" discs with Blu-ray on one side and DVD on the other.