The technology, named HyperSpace, will be based on Linux."
User will be able to boot in a few seconds straight into the DVD player, skipping the longer Windows startup, or switch to the DVD player from Windows. If Windows is running at the same time, it can be put in sleep mode, prolonging battery life.
Laptops with a media player separate from Windows already exist, but the players don't run parallel to Windows (you have to boot into the player, then shut it down and boot into Windows to switch tasks).
Laptops with HyperSpace would likely have a separate button that instantly switches away from Windows.