Steal this idea: the Etsy of games

Create an eCommerce platform for game developers, game affictionatos and game culturists of any shapes and sizes.
Get away from the current portal options of Steam, App Store or web portal (Big Fish Games, Trymedia, Yahoo) Focus on the art and craft of games and provide the tools for game makers to experiment, grow personal communities. 
Lastly and most importantly go beyond playable games to encompass culture of play.