Android seems to pop up in places you wouldn't expect these days. Take the upcoming Hyperkin Retron5, for example. That is a device that will play Nintendo, Super Nintendo, Genesis and Game Boy carts and accepts the original controllers from those systems (well, accept for Game Boy but that should be obvious). It appears to be an emulator that is built on Android.
By the way, the proliferation of Android should come as no surprise. The mobile OS is built on Linux and that operating system has been around for years and is very flexible.