https://www.cnet.com/news/top-7-trends-in-mobile-gaming-from-gdc-2019/

And that choice helps explain the success of Fortnite on iOS and Android, Rohrl said, where despite the obstacles of playing on a mobile phone -- limited controls and a smaller screen, which put the player at a competitive disadvantage against those on PCs and consoles -- the game has been massively popular on mobile devices. A phone has advantages too, Rohrl said. It's much more convenient and spontaneous to play together with friends while hanging around at school or home.

If you like running around on your phone bashing people, then 2019 should be as much fun as 2018. Fortnite, and PUBG before that, showed that mobile players like real-time battles. Even Pokemon Go joined in, rolling out PVP real-time combat at the end of 2018. According to Rob Giusti, senior software developer at Niantic, Pokemon Go gained the much-requested PVP combat mode to infuse the spirit of Pokemon battles into the game, to please both casual and hard-core players and to lure back lapsed players. According to Giusti, the plan worked, with the new battle system having a positive effect on retaining players and extending play sessions after it launched.