well, only so many devices one can control through IoT. (home)

but if to combine with different environments,

water(ocean, lakes), security cameras, space (one day)....

tunnels, pipelines, bridges, forest/nature, labs, etc.

or generally to interact with Tesla bot.......

etc. i'm sure there are more usage....

3D printers... desktop manufacturing tools.... etc...

automatic bird feeder....

car location/battery check....

tracking devices....