With the combination of typing and hand tracking, it is useful to have a means of feedback to tell what exactly you are doing. Whether a gesture has been recognized or not, whether you enable or disable Caps Lock, and more.
This video shows how Typeware provides a gentle, vibration. Only local - unlike mobile phones or VR controllers.
Watch/listen how it works, Where a glass has been used as a soundbox to audibilize the vibration.