Oh, it can do 3D too. Some crew members complain that the 3D gives 'em headaches, is too dark and they don't like paying the premium for a ticket.
If you watch Avatar in 2D, the holographic displays are still seemingly 3D, because the camera is in motion and the angles on the displayed 3D graphics change. But they are still only on a flat 2D plane. It's a weird effect.