This would be handy to adjust the volume or pause the currently playing track on your smartphone. It always kinda annoyed me that I had to take it out of my poc

This would be handy to adjust the volume or pause the currently playing track on your smartphone. It always kinda annoyed me that I had to take it out of my pocket to do that. It's a cool technology, but i think it won't be more useful or productive than a regular touch screen. How are you gonna swipe on a bumpy touch screen?