I don’t know if I agree about new games. This is a bit of a problem with some AAA games though. The indie game scene is still thriving as far as I can tell, in some genres more than others. (E.g now is a great time to be into FPS games.)

A good old game can occupy you for many hours though, and it’s hard to make good games period. I’m not surprised that a few older games dominate the market.