Not all that unlike religion. Here's this thing, it feels good and you lose touch with reality but you won't realize it. That's pretty much the definition of insanity. And you're like yes please? Can't say I'd go for that myself but to each their own.
That's fine we will still need people to keep tabs on the robots that run the world to make sure they don't decide to pull the plug on all of us.
I really do see something like this coming about eventually. In the future when robots occupy the vast majority of available jobs something will need to be done with the jobless. Not everyone is going to be some scientist, artist or permanent tourist in the world. Letting people plug in to a virtual world where they can be whoever they want, whenever they want, however they want would be an excellent way to keep the population from going in to some sort of unrest. It would be the ultimate form of population control. Who wouldn't have fun facing down a Roman Legion with an Abrams tank or maybe you would like to visit or live in feudal Japan or be the captain of a federation starship. What I am talking about could be used for anything from a virtual vacation to a complete life replacement.