Vine
Vine was the voice of a generation. This was an app that helped people become their most creative. People who wanted to use it for comedic purposes were forced to create a cohesive joke within six seconds. A lot of other viral Vines were random, hilarious situations that happened organically. We miss Vine. It lives on through tons of Youtube compliations now.
Curved Televisions
Early in the decade, someone thought that having a TV with a curved screen and 3-D abilities would be a hit among households. If anything, a curved TV looked cool on the wall but literally offered nothing more than what normal flat-screen TVs offer. Plus, having to wear 3-D glasses in your livingroom wasn't very appealing to most customers. Naturally, this invention was a flop.