A 2016 study has high hopes for gamers even though consoles and physical discs are not anywhere near where they used to be a decade ago. Mobile gaming could rise to 68.4 billion USD in market value by the end of this year compared to 59.8 billion in 2017 with Fortnite, PUBG, Candy Crush Saga, and Pokemon Go leading the pack in terms of popularity.
https://www.notebookcheck.net/Gaming-market-expected-to-balloon-past-90-billion-USD-by-2020.304870.0.html