There are any number of reasons it could be important for me to get into my house or garage right now: I've left the stove on, I've left a soldering iron on on my workbench, my partner has collapsed, I've popped out to pick something up from the garden and have accidentally locked myself out and my baby is inside unattended, or I'm just really effing tired at the end of a long and draining day at work and it's that one last straw (and the list goes on).
Sure, I probably wouldn't lead with swearing, but I can pretty much guarantee that if the situation wasn't resolved very quickly swearing would result.
All of this just strengthens my resolve against the idea of living in a "smart" home. Give me a physical lock and key, and a decent EDC solution for carrying the latter, and I'm happy. The one improvement you could make (which a friend pointed out to me the other day) is to add central locking. I.e., I leave by any exit and lock the door, and every door and window in the house locks. Of course, there are ways that could backfire so it needs some careful thought, but you get the idea.
Anyway, I won't be buying a Garadget or any similar device anytime soon.