Living in VR, and the implications thereof, have been written about in SF for decades. The earliest work is "Simulacron 3", from 1964. It's been done to death in anime. "Sword Art Online" is probably the best known stuck-in-VR anime, but "Log Horizon" deals with the philosophical aspects in more depth. Hanson is not breaking new ground; he's recycling SF as economics.
Read Hanson's list of "wild ideas".[1] "By 2100, the vast majority of "people" will be immortal computers running brain simulations." (And the rest will be keeping the server farms going?) "If we keep writing down common sense datums until 2100, we can make computers as smart as people." (After 30 years of Cyc trying that, that's probably a no.) "If we allowed complete freedom of contract, law could be privatized, to our common benefit." (He's at George Mason University, which is a right-wing think tank, and has to say stuff like that to get tenure.)
Read Hanson's list of "wild ideas".[1] "By 2100, the vast majority of "people" will be immortal computers running brain simulations." (And the rest will be keeping the server farms going?) "If we keep writing down common sense datums until 2100, we can make computers as smart as people." (After 30 years of Cyc trying that, that's probably a no.) "If we allowed complete freedom of contract, law could be privatized, to our common benefit." (He's at George Mason University, which is a right-wing think tank, and has to say stuff like that to get tenure.)
[1] http://mason.gmu.edu/~rhanson/wildideas.html