>What is the coolest thing you can do with a smarthome? The single biggest selling point?

I like having WRGB light bulbs everywhere that have full control via app/automation. I can wake up with "good morning" mode, have a day mode that's bright white and shifts to amber at sunset. I can go all hunt-for-red-october (pure red) late night. I can hit (or say) "goodnight" and transition the whole house to night mode, etc. Party mode is also rather fun :{

Best of all it works without having to do an expensive PoE retrofit to every switch and bulb in the entire house.