Yup. The way I see it now, it's
"all the dollars, talent in graphics department, and ideology of making everything Bigger, Better and More Movie-Like"
vs.
"we're just trying something new to earn our living because we cannot produce as massively epic games for dummies as those more mainstream companies" companies at the moment. Soon there'll be more well-known companies satisfying some marginal groups' demands. Like, for example, us more hardcoe RPG fans. ^^ Bethesda have made their TES lore so deep and interesting in the past, though, it's a crying shame seeing this product of all products commercializing.
However, I still think there's going to be change in the styles of mainstream games, for better or worse. Actually everything is constantly changing, but the change might be so slow we don't often notice it, e.g. language change (which is slowed down by such things as formal prescriptive grammars and ideas about "pure" or "right" use of language, for example; I'm sure there are forces like this in gaming industry as well, affecting the shape of mainstream games one way or another). Although I think gaming must change from this today's ideal about being "epic". I mean, how much more epic can they get? Composing and producing of gaming scores, for example, cannot possibly become More Massive And Unbelievable in Their Sheer Pompousness for very long anymore. These ideals we're now having are reaching their limits sooner or later. Then there will either be downhills for gaming companies who still think they should try to make an even more "epic" product, or they can invent something new that makes so good an impression to players that it will become a new ideology. Epic isn't the only style of literature or other forms of art; some other style might soon arrive to gaming, replace it and become the most popular.
This sort of paradigm shift happens all the time in everything all around us. There's a new thing. It grows. People like it. People then begin to get bored to it. Then that thing will slowly fade out. At this point, though, a new idea (hopefully) is invading, say, gaming market, for example. Basically
1. the popularization of a new invention X
2. X's steady state on the top
3. general need for something different for a change; X begins to lose popularity
4. X gets forgotten, or rather, it just downgrades and never completely fades out. It or its variation might rise again at some other time. Anyway, at this time, the fresher and/or just fitter idea called Y has replaced it as the most popular idea.
5. Eventually Y suffers X's fate in the hands of Z, and the cycle endlessly keeps repeating itself.
That's life, even. Fashions come and go. Ideologies, religions... every philosophy or more concrete invention. Everything. I'd say that as minor thing as gaming industry - and popular culture more commonly - is coming to end of its current "for Dummies" form more or less. People don't buy another new big-titted, glitter-using woman's albums, no matter how many stations play her for money, because they're tired of those "hits" that are all the same. Currently, in this broad sense of the term "popular culture", in my eyes at least, X is about to give way to Y.
I don't yet know what this Y is, though. It will still have something to do with youthfulness and beauty, for sure, but I guess more brains are included this time as well.