Ok I just got Higher Learning, and after going through it twice, I can't find a TurboDuo anywhere. There is an object that is in a shape of a TurboDuo, however isn't anywhere near a TV (where it should be) and the shot is a fast-panning, burry shot (in other words, impossible to verify that it was a Duo).
On the other hand, at about 1h 22mins into the movie, one of the characters has a HUGE printout of Zonk on his closet door! This is really obvious and might have been what people were talking about. Screenshots & video clip coming up