Should be good. The hardware in the Wii left a lot to be desired graphically, but the inclusion of motion-controls from the start catapulted the console into a "family gaming" machine, where XBox and PS3 were left as more "hardcore gamer" machines, with their traditional controls and highly-priced hardware.
Nintendo survived Atari, Sega, Sony, and Microsoft by innovating both with the console and the content (not ONE of those competitors could have created a franchise as insanely successful as Pokemon, they just don't have it in them). They'll survive Apple and Google too (those aren't gaming platforms, they're phones and mp3 players that happen to play games). PCs didn't kill off consoles (heck, lots of people are still touting that consoles will kill off PC gaming). Besides, with the next Gameboy, you won't have AT&T/Verizon telling you what apps you can download or how much data they can consume (hopefully).