Relive their youth?! They'll be so depressed after that. And when they realise they are too weak to actully visit places, they will just kill themselves. Anyway, old are just forcing young to pay for their pensions and have amassed huge wealth after large scale industrialisation. Theranos had a point. We have too many people and the old are a liability.

Jokes apart, this is not bad. There can be medical complications, many other reasons why this may be a great tool to engage old people and lift their spirits up.