Everything points to 1980 except for Pac-Man, which came out for the 400/800 in 1982. Atari’s probably cheating a little. I don’t see a Pac-Man box. In fact, the only game boxes I see are Super Breakout and Kingdom. The screenshots on both sides of the TV fall under different headings. I think the one in the middle is “entertainment.”
I don’t remember seeing the display. It’s possible I blocked it out—there’s no way I would’ve been able to push my way to the front of the line for a chance to play. The big kids ruled the demo units. And by big kids I don’t mean the well-dressed, well-mannered couple in the ad.