I personally am unconvinced that the barrier to voice messaging is the interface. I think it is deeper than that. It is psychological. People are not (yet) comfortable speaking into inanimate objects that do not respond back instantly. I imagine that most people still feel silly speaking &#x27;into&#x27; or &#x27;at&#x27; an object and waiting. People don&#x27;t type with their voice for the same reason they ask &#x27;can you hear me&#x27; in a video conference or say &#x27;hello&#x27; and wait for a response at an automatic gates, door bells that need people at the other end to respond or open, at drive in counters... etc.<p>That said, I completely agree with the WhatsApp bit. It is changing the way people interact...and it is surprising that it hasn&#x27;t been as popular in the US.