A big part of Nintendo's switch to focusing on controllers has come as a result of the less obvious benefits of improved hardware.
Nintendo has always focused on controllers. The only time they didn't was the GameCube and it was HUGE mistake.
NES - dpad and the base design for modern controllers. Light gun
SNES- shoulder buttons and the 4 button layout used by everyone today while their competition released a 3 button controller.
N64- Analog sticks and rumble packs
GC- a dual shock with better placement of the left stick, terrible right stick and an analog trigger (which the competition had)
Wii- Nuff said
WiiU- Nuff said
Controllers were always a big focus of Nintendo if not the focus.
Yeah, that's the DS and Nintendo had that concept for YEARS and never did anything worth a damn with it.
I don't even know wtf is going on here. First of all you must have not played anything on the DS because I can pull out dozens of examples off the top of my head.
Secondly you have obviously not played Nintendoland which lays out nintendos ideas which are mainly a asynchronous multiplayer and not DS related at all.