Watt's Blindsight, and probably other books, go into this concept as well, if tangentially. Wouldn't you know it, the creaters in the book called it Heaven
.
And in typical Wattsian fashion, he somehow made it seem goddamn horrific alongside everything else :p
I for one welcome full immersion VR, and it's not a bad "population growth" solution posed by some in regards to the effects of a post-death world (though TBH if we were able to conquer death on scale that it contributed to overpopulation, I sorta feel like we'd able to solve the overpopulation thing in a number of less crazy ways).