Saw similar tech at Microsoft a decade ago. Use case I saw was to raise buttons on software keyboards. Here’s an article on the patent from 2010: https://www.sbs.com.au/news/article/microsoft-patents-bumpy-...
[Button raises]
. . .
Still could be worth implementing, for switching major modes in apps. E.g. when browsing one may not need the alphanumeric keys, until a textfield is highlighted.