I think your point is relevant if you spin it a little bit. I think modern (loosely defined as 2000 onward) games have a way of being not so much a fun diversion as an 'experience'.
As gaming becomes big business, companies try to hype a game as a 'not to miss experience' much like a studio in the film business might. So in the midst of this hype with trailers cut like a Hollywood thriller, the players expectations are this game will not only be fun, it will be a 'not to miss experience'. Players are perhaps starting to look at things through a different set of eyes coming into a game, and perhaps this is changing the experience from purely 'fun' to one of hoping the game can fill the expectations of being a 'not to miss experience'.
Take Halo 3 for example. Nobody said "I'm going to get this game because I want to have some fun". Fun just don't sell Master Chief helmets. People were looking at this game as the last of a saga, something they just could not miss. So the game went from something fun to something people were looking to, to provide the 'not to miss experience'.
Wait. What in blazes am I talking about? Of course games are still fun!