After just updating from sub-10Mbit/s connection to 50Mbit/s, I don't really see why this would be something for which to waste a free wish. I honestly can't think what I'd do better with a gigabit connection.
Perhaps you don't upload much video/content. Most non-symmetrical Internet connections have HORRIBLE upload speeds. Makes doing things like recording multiple security camera's to the cloud at real high resolution impossible.
Gigabit speeds are typically symmetrical.