I expect it'll cycle. We see things in all areas of training that could be considered "styles". Look at fitness crazes, group fitness classes, how people train for strength, etc. I do think there's a lot of style-mixing now, and it's starting to result in new thoughts on what a "style" is. Then, in a while, we'll get a new bunch of "styles". It's the nature of humans - we tend to classify things.I think the idea of styles is slowly dieing. I like the idea of just training ranges. Bruce Lee had that right.
Get your kicks and knees, and learn how to defend against them.
Get your hands and elbows, and learn how to defend against them.
Get your throws/takedowns and takedown defence.
Get your ground game.
It doesn't matter where you get them, only that you can do them with competence. If you can get it all in one place, all the better.