Mobile apps to control your car remotely
How widespread are they? Very. If you've bought your car in the past few years, it was probably an option.
What they are: Many car companies offer special apps that customize the way you interact with your car. Systems like Toyota's Entune provide almost the same functions and capability as CarPlay; Tesla's app allows drivers to see metrics like range and battery level; and many General Motors apps let you remotely start the car or unlock the door from virtually anywhere. Download your car manufacturer's app in an app store, input your VIN and verify some personal details, and you're off and running.
Will you use them every day? You just might.
Satellite radio rewind (and fast-forward!)
How widespread is it? If you've got SiriusXM satellite radio, you've got this.
What it is: Ever turn on the radio at the tail end of a really great song? The functionality of satellite radio allows you to "rewind" to hear it again, or fast-forward through a song you hate. Just use the standard reverse and fast-forward buttons.
Will you use it every day? If your jam is top 40, probably not. But for those obscure deep tracks you don't want to miss, here's the cure.