I suppose this is mostly just Tesla wanting to "beta" test the technology & collect some data to work with for future optimization...
I just don't see the practicality in this specific functionality that they're rolling out -- sure, it's neat, and I'm sure many of us would love to show it off to our friends for the wow factor.
But right now, you pull in the driveway, and tell your Tesla to park in the garage. It opens the garage & parks. Now what? You've got to follow the car into the garage & plug it in to your wall-attached charging cord.
Same thing when you leave the next day -- you've got to unplug the cord before you summon it to the driveway ~20 feet away...
Neat for sure, though. ;-)