Don't ask what can IOT do for you, but what can you do with the IOT....or it was from somewhere else?
The key for me is "utility".
On one side, Raspberry PI, Arduinos and others have given to many users, who didn't have the skills or time to build their own boards, the possibility to expand programming beyond a PC or mobile device very cheaply.
But once they see that a LED, a push-key or a sensor can be controlled, they are abandoned in a box...
But if this sensor for instance monitors a door being open, a remote measure of any kind... you can transmit it through the internet and receive a notification in your android device, then push a button and fire an alarm or control something...the world is at your hands