The Blu-ray disc will come with special 3-D glasses enabling home viewers to watch the 3-D footage without need of additional software or hardware (other than a Blu-ray player and HDTV, of course.)
I've always been facinated with 3D movies ... not that I will buy a "Hannah Montana" DVD of course (my niece might like it), but there's a market for these type of things, especially now that screens are getting larger and larger these days which suits 3D films.