Comment by jolmg

It should be useful when trying to type in a vehicle that's shaking a little. Your can tap another key by mistake on a virtual keyboard amidst the shaking, but not really on a physical one where you're grabbing and navigating the keys with your thumbs prior to pressing.

Virtual keyboard haptic feedback seems more like gimmick. If it actually serves a functional purpose, I'd be surprised and interested. Maybe if you had feedback activate as you glide through the keys, but Google's keyboard at least doesn't.