Mustek decided that if one screen on a DVD player is good, then two screens must be twice as good. The result is the PD77, calling a truce between those combative backseat passengers by offering them each a screen, and giving you a fighting chance at getting them to stfu.
The screens are 7-inch 480x234 LCDs with tiny speakers and a stereo headphone jack, and the playback unit pumps video from DVDs into both. The system can also handle CD and MP3 audio, and other video files such as DivX, XviD and AVI.
That 480x234 screen has barely enough resolution to suit me, but I suppose it's enough for standard-definition DVDs. Good luck hiding those cables connecting the two screens, though.
Mustek PD77 two screen DVD player [TechDigest]