Suspended animation makes various appearances in Star Trek. It's a great concept that would solve certain problems in sub-light travel (TOS "Space Seed") or give an individual a one-way trip to the future (TNG "The Neutral Zone", VOY "The 37's"). "Space Seed" portrayed a hibernation process that drastically slowed all bodily functions, while the two later cases were about cryonic freezing that stops everything. The opening scene of Genesis II (1973) is among the coolest things Roddenberry ever did. The hero's body is in a hibernation chamber that got buried in an earthquake and lost for centuries. Then he is found and revived. That really stirs the imagination. In real life, the remains of some dead people are frozen, but as you might surmise from the way I framed this sentence, I don't think they're ever coming back. They don't get frozen soon enough after dying, and there are other obstacles too, as described in the Wikipedia entry for Cryonics. It looks pretty bad. Reversible hibernation, on the other hand, has been limited to cases of very short duration but it seems like the more plausible route. I personally wouldn't volunteer for an experiment, but I can envision progress coming. I think waking up in a future era is a good sci-fi concept, but the reality is too full of unknowns to try it out.