It was a good idea and it looks like Sony wants in on the action. According to a tweet by Evan Blass, he has revealed that Sony could be working on a similar earpiece called the Smart Ear. Details of the device are a bit scarce but as you can see from the rendering, it will be a small device similar to the Moto Hint.
Presumably we can expect the very basic functions like being able to pair with smartphones via Bluetooth or maybe even NFC. On the surface it does not seem like there might be any buttons, but perhaps the surface could be touch-sensitive in which users can adjust volume or maybe tap to answer or reject calls.
In any case Sony is expected to announce the headset at their event at MWC 2016 later on, so do check back with us later for the details.