Made by Dal Nippon Japan, this 46-inch Transparent Projector Screen produces sound directly from the screen itself using an embedded speaker technology called “SoundVu” — developed by Nxt Plc. One drawback, it costs a hefty $4,000, projector not included.
Then there’s the built-in speaker: it’s actually an extremely thin layer that covers the entire screen, vibrating to create sound. Because the speaker is distributed across the entire surface, there’s almost no directivity, so you can hear it from any direction
[via NewLaunches – SciFi]