What you are describing is 'Hard Science Fiction', and yes, a lot of scifi has very fantastical elements. Some use "any sufficiently advanced technology is indi

What you are describing is 'Hard Science Fiction', and yes, a lot of scifi has very fantastical elements. Some use "any sufficiently advanced technology is indistinguishable from magic" as an excuse, but I think the reality is that it is easier to write compelling stories and create spectacle if you can ignore the limits that 'Hard Science Fiction' puts on you, because you can just make shit up. So there is more of it. Also, you are describing realistic, near future fiction, and that by definition will not have a shelf life of more than a few years and decades will be the outlier. Almost the entire Cyber Punk genre is now really Alternate History. I haven't seen a cathode ray tube in years. I don't think it is particularly new. Maybe its more obvious now because there is more bleed between Science Fiction and Fantasy as separate genres. You had your Azimovs and Clarks, but you also had your Dicks, Zelaznys and Moorcocks.