No worries mate. We all know it’s a lot to take in.
It can be used for those things. Unfortunately most systems like that are very simple and just use the UID, which doesn’t leverage any of the advanced functionally of the smartcards. There’s a community driven open source deadbolt lock, but it’s not near completion yet. The VivoKey team has plans to make a lock that can leverage the advanced security functions, but that’s still a WIP as well. You can currently use it out of the box to start a Tesla though, and we’re exploring other vehicles