I think it's pretty fair to call Fortnite the H3 of this decade. H3 had a massive impact on growing esports and was also a huge presence outside of hardcore players. Yeah Fortnite is bigger, but it is having a similar impact on the esports landscape and the video game industry as a whole.
The only downside is that it kinda normalizes a complete lack of competition-friendly features, but that also goes to show if you make a game people like and can find a way to compete in, they'll figure out how.
OT: As much as I like watching Splyce I'm really hoping Tox/Rec/RNG can take London. As a fellow competitor I really hate their approach to practice and I'd like to see them take an L to maybe motivate them a little more for ATL.