Peter F. Hamilton Besides writing marvelous sci-fi which I would recommend everyone to read, many of his books center around a world where humans rejuvenate. Basically you go to a clinic where your body's age is turned back to whatever age you desire (or maybe a new body is grown, can't remember). When you are there your "brain" (memories, thinking patterns etc) is backed up meaning if you are killed the clinic will…
His stories felt very much like the present, or the near past, projected into the future, with very little change.
This could be deliberate. The some of oldest people are also the richest (including having their own family planet), and least likely to want cultural change. The entire civilization could be bent to their desire to prevent change. But I don't think so. I think he just writes the present into the future.
Of course all authors find it hard to really think about a future culture different than their own. Take Heinlein, whose future worlds are often American pioneer or mid-20th century. But Heinlein added a few things to remind you that it is the future. Kilts are a trend in Methuselah's Children, white gloves for men in Double Star, nail polish for men in Beyond this Horizon, and at the end of Time For The Stars we realize that women throughout the story were always wearing hats, while back on Earth that fad had passed and women had naked heads "like an animal."
While in Pandora's Star and Judas Unchained, the future was now, with a few extra gadgets, and a view of sexism which already feels dated. (I agree with the comment about sexism at https://www.goodreads.com/review/show/149949969?book_show_ac... . And yes, Heinlein's stories were also sexist. I like the description that he write about a future with woman's lib, with women characters as doctors and engineers, but the reality of women's lib was quite different.)
On a technical side-note, the power sources really bug me. There are super-duper capacitors that can be charged over a century in order to change the weather, and incredible power sources that can be surgically embedded in humans so that a fight between two such augmented human ends up knocking down walls, but there are still diesel engines?