but im happy for someone to correct me if im wrong?
The idea of a filter placed on the screen instead of wearing glasses is interesting, but i think that the 3d image would be lost because i believe the glasses have a fast shutter response that acts with the tv's refresh rate which gives the illusion of 3d
so its kinda like... game-->tv refresh rate 100hz-->air-->shutter glasses-->your eyes
so the 3d image fills the air between the screen and your eyes
but this is all based on MY understanding of how 3d games work so again, correct me if im wrong?
long story short, yeh i think a tv with 120hz would be necessary for 3d games
AFAIK, you need to have a tv that is capable of atleast 100hz to utilise 3d gaming, its to do with the speed of the refresh rate and the goggles