This is very cool. I have to wonder though what you could do with it, like I don't mean to devalue the OP but I see a lot of people here discussing the possibilities (inventory management etc.), but what is there to stop you from doing that with traditional modding? I guess with consoles this might be useful (although I heard consoles can play PC mods this time around), but as far as the PC goes its probably far easier just to use make an actual mod for the game that does what you want instead of bouncing it around wirelessly with a relay.