The problem is, if today you buy a PC for tomorrow's demands, 2 things usually happen, PCs with these characteristics turn out to be not so much, coming to tomorrow, still falling short, although somewhat later.
Or, as mentioned, the software becomes even more demanding, in an effort to show in the game's AI every last pimple and hair on their faces, for commercial reasons and leaving the game itself in a go from point A made a point B, forgetting about complex plots that make the game more interesting using a 80% of the Gigas for the graphics. Examples are the old shooters, with very complicated maps and many current shooters with completely linear maps, but with graphics that allow you to fry an egg on top of the GPU as a result.
I think, as the current graphics are in TDM and the ones I mentioned before, they are more than enough, because they offer a plot and gameplay that guarantee fun, even if the AIs do not have the realism like real actors, taken from a movie, what isn't so important in a good game.
In our consumerist society this does not only happen in soft and games, but also in many movies, where a good script is replaced by spectacular special effects, Books sold as 'Bestsellers' in luxury bindings, which are a mediocre brick, smartphones every half a year a new one, with 20 Mp cameras, 8k, to take a selfie and new functions that nobody needs, with most people using it to post on WhatsApp and play CandyCrush.
We are falling into a trap that makes us lose sight of the essentials of what the things we use should contribute.