The killer thing is, most "casual" (e.g. Tetris, Meteos) games have far more replay value once you are "hooked".
These types of games normally have a few gameplay modes/variants, and you can easily find yourself playing far more than 80 hours, leaving replayability in linear, story-based games way in the dust.
It harkens back to the "golden" age of videogaming, where every level was essentially the same but a bit faster/ harder-hitting/just overall more difficult the more advanced you get.
The beautiful thing about these games are that since they are easy to pick up, play, and put down, you wind up investing more time into these titles than you do in epic blockbusters that warrant one play-through, albeit in noncontinuous sessions.
As an example, I played Tetris the first time on CGA on a PC. With all the different versions of Tetris out, I have probably played that game, across multiple platforms, across one generation, far more than any other game I've ever played. And I bet I am far from alone. Same goes with Minesweeper and Solitaire.