Oh, are we talking about gaming history now? Cuz I got 50 pages and several hundred sources on it.
Computer Space was the first
commercial video game. It's failure was over-exaggerated, just as Pong (the one specifically from Atari) has an over-exaggerated success attached to it. A lot of the success came in the wake of all companies, including Atari, making their own Pong clones. But yes, detour.
Brasas: Actually, since we are on a slight history detour, it's interesting to consider why sci-fi, fantasy and war dominate(d?) gaming as themes.
Mainly it was because computer scientist = NASA nerd in those days, but also because space was easy to draw. Seriously. Whilst Spacewar! had a very accurate star system and everything, most games of that ilk just used indiscriminate dots (or black void). Space Race from Atari had Asteroid fields full of lines. Sci-fi was as present as a number of themes in the VERY early days (early 70s). Fantasy started cropping up a lot more as the two communities converged on Dungeons and Dragons, then Star Wars blew up and started making waves of its own.
Brasas: Thirdly on gaming itself, the super traditional genres from the late seventies, early eighties were war games, arcades and rpgs.
Early 80s was not the "RPG era". That was late 80s, wherein Dragon Quest, Pool of Radiance, and Ultima 4 came out. The only games in town in the early 80s were Temple of Apshai, Ultima, and Wizardry, so I definitely wouldn't say it was a dominate genre. Innovative, perhaps, but not dominant.
Brasas: PS forgot about sport and simulation, but I guess that doesn't affect my points. I guess it's interesting to consider how the strategy/ action hardly applies to boardgames.
Simulation sort of goes with the space thing. Interests in very technical happenings. Goes all the way back to the Whirlwind computer Bouncing Ball program. Something visual and tactile for people to actually see.
But yes, back to the point of this (can't help but get involved in a vidja history tirade), the market doesn't need to shift to bring anybody in. Just do what the Marvel movies have been doing: Make the overtly nerdy traits of the medium appealing to wider audiences. Everyone saw the Avengers for a load of various reasons, none of them having to do with politically guilting people into caring about the movies. They too were standing on the shoulders of successes before them (even the Tim Burton Batman movie had fair success), but they revolutionized the way for people to engage with comics and fantasy/sci-fi elements.
The market is far from perfect. Publishers still try their worst to screw us over in various ways, but altering thematic content at the behest of moral guardians isn't going to change anything. Video games have been respectable for a long damn time, and I'm not going to be told that I'm a terrible person for being an enthusiast about them. A lot more could be done to make actual hardcore games appealing to wider demographics like Nintendo and Square somehow managed with Fire Emblem Awakening and Bravely Default, but I won't defame those games' quality because I feel that "MA MESSAGE" is more important than quality games.