In a session separate press event run by LG Display (the division of LG that makes the LCD imaging panels for LG and others), we had an opportunity to view LG's shutter glasses and FPR passive glasses sets side-by-side, in three separate setups, only one of which is shown in the photo. The FPR technology, by necessity, discards half of a source's native vertical
resolution—inevitable in 3D displays with passive glasses. That is, each eye-image is 1920 x 540. The loss was not obvious in the demo, though for me, apart from some unfortunate ghosting (not uncommon in LCD 3D active shutter sets, but not on plasmas), I found the shutter-glass displays to be a little punchier and brighter (the passive FPR showed no ghosting). The FPR technique is claimed to retain greater measured brightness, as shown in the photo. Other viewers present thought that the FPR was brighter, but I did not (a gamma difference, perhaps).