The flaw with the whole cryogenic stuff is this: Why would the people of the future revive you? Oh, sure if there are only a few such frozen people I can see the historical curiosity motivating it, but if they are not that rare you had better be somebody that has an interesting historical perspective or significance or they are going to either leave you as a popsicle or just turn the machine off and bury/cremate you. Why add someone who is hopelessly out of date to the population? That is just asking for the person to be a net drain for the rest of their lives.
For those of you asking for 500 years, imagine if we had tens of thousands of cryogenically preserved people from 1514 that would could revive and cure of their generally curable ailments? We're talking about people who were put into cryogenic suspension during the reign of Henry VIII, and early in it. They don't even know of the Protestant Reformation, let alone the massive changes to human perspective and knowledge in the last 100-200 years. Why would we revive more than a handful of these people? They have no connection to our time or to anybody in our time.
