Most gaming will be casual, in VR just like non-VR.
But there are much better and deeper games in both cases.
VR just isn't that wanted by average people. "Immersion" just isn't a magic panacea that older execs seem to think it is, and being in a "virtual world" while you play most games don't make them better games! Oddly enough, most people don't play videogames to emulate real activities, but rather to play games, with their own made up rules and concepts. FIFA on the Xbox is nothing like actual soccer, but the players prefer it like that, and a FIFA that requires you to kick the ball with your real foot and costs hundreds of dollars is NOT better as a game, or more fun to most people, than "flat" FIFA.
We literally already went over this with the Wii; shoehorning in "realism" into games that don't benefit from it just makes shitty games.