While I completely agree with you, the one thing I question about the restaurant tv example is, does the child zone into the tv because it is something they rarely experience and provides changing imagery that catches their eye?
Again, I don't disagree with the overall point, I just wonder if their interest that you are experiencing is due to the intrigue of something new and not necessary zoning out just because it is a tv.
I have the same experience. Even if the TV seems to be tuned to an "ads-only" channel, or some sporting event that holds utterly no interest to me, it captures my attention repeatedly.
It's like the visual equivalent of a mosquito buzzing by my ear; not at all desirable, but extremely difficult to tune out.
Again, I don't disagree with the overall point, I just wonder if their interest that you are experiencing is due to the intrigue of something new and not necessary zoning out just because it is a tv.