Cars. I'd like to turn on the AC afar remotely 15 minutes or half hour before get into the car on a hot day, or heat it up remotely on a freezing day. Some might already be doing it (Tesla).

Watering system. It can look up the season/weather and adjust the amount of water to sprinkle.

Battery. So that it can send out a signal when it's low on power. I know it's probably impractical but we are talking about ideas for the future.

Credit card/smart cash card. Yes, I want to look up balance/transactions, transfer money, and be alerted on charges on the card itself with the screen and network on it.