Star Trek really was true science fiction, the old ones. Sure, Kirk shagged his way through the universe and it was entertaining, BUT:
Communicators, i.e. cell and or phones that can communicate from earth to space like Iridium.
Touchscreens, tablets, Flat Panel TVs, Virtual Reality, tractor beams (optical tweezers using lasers really exist today on a microscopic level), AI, speech recognition, lasers, holograms...
You need to realize, something as simple as a self opening door using IR barriers, motion detectors or other means while already invented were not common in 1966 when the show first aired.
Today the old shows seem corny, but it really was true science fiction with Roddenberry doing his homework on what future tech might bring us.
Sadly, what he didn’t foresee is how friggin androgenous we would become in the future, you surely won’t see a LT Ohura showing her legs today anywhere, and half the men out there don’t deserve to have testicles.