They already said that they want a similar architecture for both system so that they can use the same game engine for accelerated development time and make more game available for both systems. This would mean no more waiting for a game on the home console as every game made for the 3ds successor will be easily portable the the home console at a low cost. It probably means also that you will be able to start your game on the console and continue to play it on the portable console during your bus ride to work (or school for the young crowd). If the home console is like the Wii u, then more than one gamepad would still be to much on the system ressources. They could, with the portable, use its power to make it a second controller for your guests without the need to sacrifice the much needed processing power of the console.







