Having a booth for a PC game at conventions used to be difficult because people were not familiar with keyboard and mouse controls. If you weren't prepared for this you basically had to quickly add controller support somehow and send someone from your team to the next electric store and to buy a bunch of controllers.

Nowadays, though? Game convention visitors these days barely know how to hold a controller. They keep poking at the screens, hoping something happens. It's a frustrating experience for indie devs sometimes.

So yeah I'm not surprised when people look at keyboards like they're some kind of ancient slate.