Not to worry 4D will be eventually and there will be no need for the glasses , I went to 3 shops at the weekend and tried 2 samsung 3D TV , one with monsters v aliens and the other with avatar game . The other shop was Panasonic's with there own demonstration film and i have to say its ok ,
The flicker from the glasses gave me a head ache within 5 min though and sometimes when you looked at people they may of been in a 3D environment but they were still 2D which didn't look good , this happened when you looked directly onto a character you just didn't get any feel of depth to them