Well not the answer but more detail, from a scientist (for real!)
I set both glasses on the couch frame, about 3.5' high and turned them on and played a PS3 game with the xbox off and te kinnect down and out of site. Both glasses stayed on for 47 minutes, long enough for me to get tired playing games jumping between the 2 glasses on my knees.
So, I grab a pair and sat on the couch. About 20 minutes into gaming they shut off on me. Not a huge deal but upsetting in that I want this awsome tv to be perfect!
Later, I played Xbox, with the Kinnect hidden, and they shut off twice on me in an hour?
Weird. I thought they were designed to shut off automatically after no motion in 10 minutes, but this clearly did not happen in my first experiment.
Next I will unplugg the wireless intercom from Radioshack that in a few feet from the tv. This is one of the 2.4 gigahertz (or whatever) that you hit the button and procast to the children (get up here for dinner!)
Still stumped, appreciate the great customer service.