Anyone use emulators?

I have used Bluestacks in the past, although I don't really see the point to using them other than using say WhatsApp on your PC, although nowadays you can use it via web.whatsapp.com, and other things like that. I'm not sure if people still use Kik and those kinds of apps.... but I can see why some people use it.
I personally wouldn't play games on it. If you've got a PC good enough to emulate both a phone and some sort of 3D game, then you're better off just gaming on your PC. Download Steam and you'll have a much better experience.