If it comforts you, I used an upside-down SNES gamepad for a few years before ever touching a mouse. And today I use my mouse far more than any game controllers.
I think that just means new computing devices have expanded the market, not replaced old devices. Some functionality that was once used exclusively on PCs (what else did you have?) may now be more commonly accessed via mobile devices. You didn't have a PC in your pocket when you needed to look up directions on a map..