They'll never commit to building a console that directly competes with the Xbox and Playstation, so I think they should double down on what they're best at, the portable. I think it should be a system that fuctions both as a handheld and as a console. Perhaps there is a cradle that connects to your TV and also relays the controler input. The games would work on both the handheld and through the console cradle. Addition storage space could be on the cradle, too. As for the dual screens and 3D, they could probably drop both in favor of one large high-quality touch screen, but backwards compatibility has been a thing for the DS systems, so maybe not. I just don't think game designers are doing anything really neat with the feature anymore.