"The Next Big Thing" is never the next big thing.

"The Next Big Thing" is always something obvious, like Smell-O-Vision, and people try it over and over, because obviously it would be a big thing if you got it to work, and then nobody cares or they actively dislike it.

Then something absolutely 'stupid' comes along and everybody uses it every day. Nobody gives a shit about the ability to do video chats on your phone (which nearly everyone-and-also-even-old-people have today, and people have been dreaming about for nearly 100 years), but they constantly use the ability to send tiny emails from your phone to other phones only (SMS), or the ability to post those tiny emails on a web page other people can subscribe to the updates of (Twitter).