Alright, you know how in all the vidjagames, you take whatever the hell you want from everyone? Hero's prerogative, and all that. Ask TvTropes, if you don't care about today's productivity.
The ideas behind The World Ends With You made me think:
What if we could imprint items to our character by touching people's stuff, but without having to take it?
You walk into someone's house and rifle through their stuff, and then just leave. You are able to conjure to your will a facsimile of that item - and, while we're at it, you can sell the ability to do so for spirit currency or whatnot. This allows all of the crunch of the Adventure Game/RPG mechanic of casual robbery, with none of the distasteful suggestions of amoral action. Also, imagine if the really cool items were locked away in museums, and so the difficulty of getting them is in the convincing their owners to let you get your paws on them, or doing it all Sneakers style.
Man, I wanna make a cRPG now.