When I tap a button of the keyboard on my Galaxy Nexus phone and PlayBook, there is a subtle vibration. That makes my typing feel better, because I feel hitting a physical button. But I can't find a way to active this feature on my Nexus 7 tablet. Compared to my other devices, it's not helpful for me.
The Nexus 7 device doesn't have the ability to vibrate. There is also no a vibrate option in the keyboard settings. I think the tablet is lacking the required hardware.