It worked for "The Lion King," seems to be working "Star Wars: Episode I," and it will likely work for "Titanic." But will the 3D conversion of older hits continue to be a lucrative gamble for Hollywood? Like the arrival of a new home video format, studios are seeing 3D as a way to squeeze a few more dollars out of movie fans, but the cost of post-converting a film is pricey and, eventually, those fans may tire of the formula and stick to the Blu-ray instead. For upcoming titles, Pixar's visually dense "Finding Nemo" seems like a natural fit, but the dated, 25-year-old "Top Gun" does not.

- Dave Lewis