It isn't worth it at all. The game automatically drops out after X amount of time. NOW, if it didn't, you could possibly just watch movies until you get to 99% experience, then kill a monster then carry on watching movies or have fun with your GF, go out play some sport or other game, listen to music with a bunch of friends, get drunk or stoned [whatever your poison], have sex [hopefully with a partner and not solo'ing it] and do real life things, then get back to computer, oh... 99%, better kill another monster for the level.
But... sadly no, this is not possible anymore. Anyway, I guess it would only be useful when you are in town regen'ing... basically your regen gear has some form of jubilance... then, and only then would it be beneficial... I think this pretty much means solo'ing and have nothing to shrine.