I'm my OLD accommodation, the landlord (city council) had this way of charging you for heating using a wireless system.
Each radiator had a wireless device that compared radiator heat Vs apartment temperature, the difference you paid for ... Still not sure how it worked. However, it was meant (yeah right!) to be cheaper than the previous method, and apparently more accurate?
I live in a different apartment now (I moved in with my fiancée) that's still run by the city, but in this place, we pay our own bills n set our own heating n water, which comes off a pre-payment card.
Apart from WiFi, n smartphones, we have no smart wireless devices. No bulbs, no sockets, no thermostat, nothing. Not even a sound system or Alexa.
Would I want??? Hell yeah!
Cold dark night, .... Light on, heating on, all while sat on the bus. Fell asleep, and left the hallway light on... Open one eye, get phone, and turn it off.
I have a couple times, got my sky HD box to record while out. I've also used sky box to show photos from my phone on my TV (it's not a smart TV either)... It's just a feature of the sky box.