WHAAAAT IN THE ACTUAL FUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUCK?!?!?!?!?!?!?!?!?!
I REALLY don't wanna smell a video game if I am in the sewers, or horse stables, or I dunno, when the Great Mighty Poo from Conker's Bad Fur Day is singing to me. In fact, in all my decades of playing video games, most of the places I've been to inside those games have made me very glad I could not smell those environments.
And if it's a place that smells good, like inside a bakery, well I don't enjoy being teased. If I can smell good food but can't eat good food, then I'll be pissed. So good smells or bad smells, either way a device like this would piss me off.
EDIT: I see now there are only 6 scents available. So much for a fancy AI-powered device. Not that I was in any hurry to smell an in-game bathroom.