The decorations tell you what they do to the right, that one just gives +prestige, later ones give stuff like bonus offline income or reduced text timers as well as prestige. Prestige seems to be a income multiplier stat. The Rare chests up it to 7 items per open. Also it seems like the amount of workstations caps at 11 so once you get to a high enough level you have to chose which girls to use in a given run. The daily spins of the wheel seem to actually function properly unlike other games where despite all options looking equal you almost always get the crap one. Getting the multiplier bonus from the wheel is pretty good.