Without the transporter and the make-disappear-death-ray sidearms, Star Trek would barely have qualified as science fiction, let alone a scifi show with any sort of recognizability or longevity. Would we still be talking about the show if all we saw was the USN, only with sillier uniforms, and in spaaaaace? McHale's Navy did it better!
If anything, I'd have liked to see more of these truly futuristic technologies. Replicators, definitely. Holograms and synthetic personalities, too. And life support belts instead of spacesuits!