Yik Yak
The idea of anonymity on the internet is quite popular among many social medias. Yik Yak was a completely anonymous platform that let users within a 5-mile radius post whatever was on their mind. This was mostly used by college students trying to figure out what's happening on campus and where the best party was. That, and it was used to complain about other college students.
VR Movies
This sounds headache inducing, and it is! Many directors wanted to be the first to diversify their films, so they hopped on the VR trend. It's a cool idea, especially because you can control what you're looking at, but sitting like that for two hours sounds a bit exhausting. Some movie theaters even tried to introduce technology, but it never really took off.