As to the 2 or 3d player working on the 120Hz LCD, they do. But one would have to know that no 3D would be possible. The current 3D discs appear to have the 2D titles to play when appropriate.
Hope this helps and can I ask "Why not talk to the folk that sell this stuff?"
DO THE NEW PANASONIC BLU RAY PLAYERS HAVE UPCONVERSION TO 1080? AND WOULD A 2D TO 3D PLAYER WORK ON AN LCD SCREEN WITH 120HZ OR DOES IT HAVE TO BE SPECIFICALLY A 3D LCD?