I love Nintendo's creativity. They truly try to innovate the console scene with every new machine they churn out. I don't think Nintendo makes the most ergonomical controllers or the best equipment, but they certainly aren't afraid to try new things. The SNES popularized shoulder buttons, the N64 controller popularized the analog joystick and rumble, and the Wii popularized motion sensors. Their handhelds too, are pretty innovative, including the DS's dual screens and the 3DS.
Now they're not the first to have screens on controllers, but if done right this could be great. For example, you could be playing a game of poker with your buddies on it and have it so that nobody can see your hand, something that is almost impossible with current-gen consoles. Then again, they look bulky, awkward, and expensive. It may be okay if you're playing for 30 minutes or something, but I wouldn't want a 2 or 3 hour gaming session holding on to that thing. I hope the design changes when they release the system.