Perhaps sold for very little money to people who have free power. Soon it will be about power efficiency more than raw hashing power like what happened during the switch form CPU to GPU mining.
I don't see any good reasons to switch either. Ruby might be an objectively better language, but the cost of switching is high if oyu know PHP through and through and use a MVC coding style.
Nothing new, it's just a pyramid setup, a few big hits raking in tons, and a whole lot of apps that are downloaded twice or make 2 dollars a month with advertising.