Given how much we use them to talk to each other, I'm surprised you're not counting the microphone; likewise video calls and the camera.
And given how phones and tablets are so much more common than laptops and desktops, touch screens.
Arguably there's also passive continuous inputs like GPS and heart rate sensors, accelerometers, etc. — mainstream, but I doubt it was the category you had in mind.
And given how phones and tablets are so much more common than laptops and desktops, touch screens.
Arguably there's also passive continuous inputs like GPS and heart rate sensors, accelerometers, etc. — mainstream, but I doubt it was the category you had in mind.