According to Frog Design, the alternative is a true wireless earphone design
that leaves the ears — at least visually exposed. All shape and inner elements, such as micro-speaker drivers and microphones, are intended to channel noise into your ear without having to be in, on, or above your ear. When individuals around you can see your ears — even if they can see you wearing the Unum as well, it “signals a new social etiquette for the future.” It is a subtle but efficient cue that you can still hear others, even if you are attached to an audio input. It also prevents the need for the transparency mode used in standard headphones and earbuds to pipe outside sounds.
The issue is, is Frog Design going to be able to discover a courageous enough electronics business to construct and market the Unum? The design may be just what the future requires, but individuals willing to wander around with these plastic rings surrounding their ears are difficult to see at the current time.