True, and Star Trek was broadly ahead of the game on that front.

But go back and watch some of the episodes; it's still thin compared to the reality of today, let alone the reality of the future. Communicators that are like cell phones, sure, except that they only do voice transmission. My real-life cell phone is more powerful than my first couple of computers and has the apps to boot... and I have a piece of crap generic cheap cell phone, not even an iPhone. Talking computers that get asked very simple questions and are "working" for several loud seconds. No computer graphical enhancement of anything on the viewscreen (until the movies). Mainframes that generally need to be walked up to and used. The feel of the tech is very different.

Please understand I'm not complaining. This is one place where Star Trek has a legitimate claim to being ahead of the curve (although they pretty much jammed in that one spot and are now way behind) and I tend to be down on Star Trek at this point as my parenthetical shows; my point is that even so, the computers aren't as well integrated into people's lives as they are even today. Obviously, in the 1960s the special effects technology wouldn't have been there even if a time traveler from the real-life 21st century came back and tried to do it right with local tech and on a budget.