Sailfish has a crappy Android simulation layer. You don't really want that on the Desktop. Android and Desktop Linux are completely different platforms, except maybe for the graphics APIs (Vulkan/OpenGL).
I'm not saying I would want that. My original point was that the person I was replying to said that they won't believe Linux gaming would ever be predominant. I'm saying it already is.
For example Android software worked on Jolla's Sailfish OS.