I think that it will only get more popular as time goes by with an increasing amount showing up in mainstream porn. I guess it's been around for a long time and as with most niches it's following will only increase as producers cater more to it, creating a larger fan base which then increases demand, sees more creative content produced etc, effectively being a cycle.
At least we can certainly hope this is the case and with all of us doing our bit as well it can only help!
