The Spike S-512 supersonic jet, still in development, will offer incredible displays of the outside world with the option to watch a movie or work from your laptop — all on full-length high-definition displays.

One of the most exciting innovations on the Spike Supersonic Jet, other than flying faster than the speed of sound, is the windowless cabin. We call it the Multiplex Digital cabin which gives the traveler an incredible, panoramic view of the outside world on large full-width digital screens. Camera feeds provide live video from any direction outside the aircraft and can be watched without peering through small porthole windows.
How Stuff Works wrote a great article on this feature: Windowless Airplanes: The Future of Flight?