I suspect that the developers of the top 100 rift games (i.e. the games that are actually pretty good and have made some money) will be enormously incentivized

I suspect that the developers of the top 100 rift games (i.e. the games that are actually pretty good and have made some money) will be enormously incentivized to find ways to scale down the visuals a bit because of the easy money they would make. The important part is that no changes in the game mechanics are necessary, given the identical controllers and similar 6DOF capabilities.