Its not a matter of new theatres or nice graphics. The problem is the changed mindset these days. In War Thunder or World of Warplanes I can shoot something 2 minutes after the game started. The same goes for other genres. People these days play happily Apex and Volarant, but if you show the same perons Arma, Squad or Post Scriptum they'll ask you where the "action" is and complain that they can't see an enemy for about 10 minutes.
Its not a game problem, its a society thing. Compare a movie from the 70s to a movie these days. I know a bunch of younger people who would turn of "once upon a time in the west" before Charles Bronson apears the first time. Everything needs to be fast paced and instand satisfaction these days. Games where you need to get a skill to be good are not among the most popular. Evey game these days rewards you with something even if you suck at it.
If you really want to push it, maybe a two free planes for everybody and or a free weekend on steam "might" help. But I doubt the effect would be that great.