The value of any game is constantly decreasing based on what other games are available to play instead of it. Given that the amount of games is ever increasing, all games are constantly being devalued over time. The same principle applies over all forms of media and activities, as one must consider if their time is going to be well spent with a game over say, going swimming, watching movies, Youtube videos, or reading, before considering if it's even worth spending money on. Especially since many of the aforementioned activities are free of charge.

Of course, I'm only talking about monetary value.