[(The must have upgraded to a system that does a whole-cart check as you pass through their detector.)]
Arches with cameras top and sides. Link to follow.
Yes, a 'gateway' that you pass through on the way out. I didn't look closely the first time we noticed it, but was surprised and pleased that the checker just said 'You're all set' as we approached.
I know there are those who have all kinds of reasons for hating self-checkouts, but my wife and I love 'em. Of course, we go back to the early days of pump-it-yourself gasoline, when it was optional and found it to be a huge convenience and time-saver.