I'm probably in the minority here, but Bethesda games have not actually changed how I pictured the pre-war world of Fallout at all, even back when I was playing Fallout 1 for the first time.
I always thought of the Fallout world, pre-War, to be that "World of Tomorrow!" that was such a big hit in the 40's, 50's, and half of the 60's--that lofty future where robot butlers tend to your dishes, everything is perpetually powered, and keeping up with the Joneses is an exciting race to go out and buy the latest stuff. In addition to this, it seems that Tesla's inventions were favored. The whole of Fallout to me, even back before Fallout 3 mind you, was this way of stepping back and taking a look--at this world which by all means was "perfect" (not really of course), where the "American Dream" had been "achieved," where life had advanced to that teal and pink tube-powered electronics world that people in the 50's craved, and then in an instant it's gone--and the world becomes this rusted facsimile, almost like a twisted, grinning version of the "perfect world" everyone wanted but was too wrapped up in consumerism to uphold.
So we're not supposed to be asking questions like "wait, why hasn't culture moved past the 50's? Surely it would have" or things like that--no, Fallout is simply a look at what happens when that particular vision of the future is stripped away and human nature takes over--the irony of consumerism being the pursuit of ephemera like swanky magazines, robot butlers, and sugary drinks. And then it's all taken away in a flash--because even if society reaches its peak and evolves--war never changes.