You make a fair point, but I have to defend a few of the old games here. It was a time when it was a revolution to have a computer system in your home. Pong to the 2600 was a massive leap, full colour etc just having a blob you could move around the screen and interact with something was so radical in those days. Sure some are boring as hell today but back then, and lets not forget we were kids too, it was new exciting and fun.
I remember playing freeway, how simple was that but I played it for hours. Can't imagine I would play it for more than 1 game now.
It still happens today, as new techniques are learnt better games come out and make the older title look pretty poor, just compare PC games of 2 years ago and today. I'm sure the same would apply. But yes some are so simplistic that even then they were a little boring, but was that only because you had played something better in the Atari range?