I believe "Low Poly" art with flat shading, realistic lighting and particle effects will, if it has not already, become a popular choice for independent game developers making 3D games, similar to how pixel art is ubiquitous in 2D games. Of course, voxel art will still be favoured by many due to the success of Minecraft.
It is a fairly acessible art form, which means that while actual artists are still recommended, some programmers and designers should be able to make full games without the need for one.
I think more detailed scenes, and dedicated artists to create them, would be desirable for some genres, but this would still be acceptable for, say, Strategy or Simulation games, or even an RPG.
Update: I've set up a Pinterest board featuring this art style.