I think there are a couple treknologies that exist now, or at least are pretty close. The translator tech is not very far ahead of what we have today. The communicator actually influenced the design of early cell phones. Trek predicted quite a few real life technologies. I definitely think something similar to the replicators will exist eventually, hell 3D printing food already exists.
In terms of the more out there treknologies, I think the gene editing that is illegal in the federation is pretty scientifically grounded. I also think the medical tricorder will some day inspire/shape new tech similar to the communicator with cell phones.

Future shock: 11 technologies that science fiction predicted
Who knows what the future might hold? Science fiction writers do, it seems. Some of the most outlandish scenarios imagined by writers of films, TV shows, and books have come true, and they were actually inspired by science fiction. In fact, without writers to imagine them, digital technologies such as video chatting, cell phones and tablets, drones, and robots might not even exist.
