Active Shutter glasses deliver the full screen resolution to each eye; Polarized Glasses deliver only half the screen resolution to each eye (540 instead of 1080 vertical lines)4k allows all 1080 lines to be visible when using Passive Polarized glasses, so long as you are sitting close enough to view 1080p (see chart above.

We watched some 3D blue rays on it with passive glasses included -- re-watched Avatar, phenomenal

Easy setup and lots and accessible settings; Factory settings perfectly fine for most use; quick web search will find other reviewers optimum settings; 3D is as good or better than movie house; uses lighter more comfortable passive glasses that don't require batteries (I have read that the 3D on the 65" inch version is better; maybe, but the 55 seems perfect to us).

Also you get 6 pair of 3d glasses that are very nice passive glasses.

Also you get 6 pair of 3d glasses that are very nice passive glasses.

Oh yes, the 3D with the Sony passive glasses are the absolute best 3D I have seen at any setting.

Easy setup and lots and accessible settings; Factory settings perfectly fine for most use; quick web search will find other reviewers optimum settings; 3D is as good or better than movie house; uses lighter more comfortable passive glasses that don't require batteries (I have read that the 3D on the 65" inch version is better; maybe, but the 55 seems perfect to us).

The picture is bright and colorful due to the passive glasses

There are two types of 3-D glasses: more expensive Active Shutter glasses and lower-cost Passive Polarized Lens glasses

It comes with 4 pairs of passive 3D glasses and the TV handles passive with 1080p resolution per eye; which is something that most passive 3D 2k TV's could not do

well ...black glass

You will not be annoyed as in certain theaters where the screen has scratches, dark spots, curvy lines and or the brightness isn't uniform.