Wow a wiki link, what's that show, I'm fully aware off the method of cooking and what it is used for and what you gain cooking with certain cuts and methods.
It is not artificially aging the cut?!
No.
It's just slow cooking, breaking down the connective tissues, mainly collegen.
For certain things like the beef ribs recipes, you use sous vide so you can keep the meat rare/medium. Something you couldn't do with other cooking methods. Not that I think it's worth it, some people are a bit obsessed with beef should still be mooing. With pork, there is little to no point and certainly not worth the effort, unless it was just an experiment.