What would be the Nintendo Fusion distribution format?

[Darwinianevolution]

I've been thinking about Nintendo next consoles. The idea of the Fusion, in particular, would solve a lot of problems, such as droughts and dependance of 3rd party. But then one thought came to me. Consoles have their games on CDs, DVDs or Blue Rays, and handhelds have their games on cartriges. How on Earth would the Fusion games be released on retail? A Digital-only console is too dangerous for everyone, but for Nintendo more, having to recover the WiiU sales and the reduction of the handheld market. How would they distribute their games?