If it ever becomes possible to revive a frozen dead body...... the one's being frozen now will be useless because it'll be found that they've not been preserved in such a way as to comply with the way they'd be "doing it" in the future.

Although they're doing amazing medical things now (A head transplant is going to be done next year), reviving frozen dead people won't happen. If people have died, they've "died of something". They're dead.

If it ever becomes possible to freeze and preserve a body, the body would have to be alive and well when it was prepared for freezing.

At the moment, transplants of healthy organs have to be done from people at the moment of death (some, like kidneys can be taken from a still living person) but if reviving a frozen organ was possible, there'd be a "stock" of organs in storage.

It's OK saying that science fiction has become a reality with many things but I think suspended animation and reviving frozen, dead people will turn out to be a no-no.