I have no idea what your tangent onto the issue of things being released into the public domain has to do with a discussion of the cost of new games though. And going into the public domain is not a requirement for the price of something to change over time. Most games go down in price very rapidly, especially now. Most games that are a year old are reduced in half or more.... a couple years old and they're usually slashed to a third of their old price or less.
I'm honestly not sure what point you're making about the extension of copyright and the price of videogames, because the cost of videogames drops much faster than would be relevant in terms of a copyright expiring or going into the public domain.
Not saying you're wrong - I actually agree with you in general. As I've found myself playing less games, I've really cut down on paying $50 or $60 for a game when I know I won't play it for more than a few hours. I'll still buy a game if I know I'll get a lot of value out of it.
But my main point is, I don't think they need to reprice games based on people like you and I who don't play much and therefore don't find full price to be worth paying. Going back to my car analogy, I wouldn't expect them to start selling cars for $2000 to satisfy the small contingent of people who rarely if ever drive and therefore wouldn't pay more than that for a car.
The value of a program is proportional to the weight of its output.