Do you really always have your phone on you when you're at home? When I'm outside then yes I have it in my pocket, but at home it's either charging or just on the table in a different room.
This is why they aren't useful around the house for me. I will say that I regularly use the one glued to the outside trim of my garage door (white on white trim so completely hidden dot) to open and close my garage when out biking with the family. That's actually really useful.