In a 100 years (and maybe well before) virtual experiences will be experienced as real and “persistent” as reality. This will be both scary and desirable.
It will be seen as the accessible “last frontier” (reality constraints stopped our long real-spatial exploration heritage) and will “only” be limited by pure imagination, collective creativity, emergence...
What I mean is that despite all the real global challenges we face (I'm relatively optimist at a century scale) the future will mainly be marked by the upcoming merge between reality and virtuality because virtual offer many more cases of “possibles” which will fill many “desires”.
When I see those 3 quotes from thinkers who never talked to each others I definitely see a relationship between "real" and "virtual" :
"Reality is merely an illusion, albeit a very persistent one" - Albert Einstein (Physicist)
“When lots of us project our fantasies on abstract things realities can be created" - Edward Castronova (Economist)
“The real is a particular case of possible” (that I roughly translated from French) - Célestin Freinet (Pedagogue)