Reggie hints at the future of Digital games on their platforms.

[SuperNova]

Reading through OP my first thought was Amiibo as game keys?

I don't really think that would happen though. Reggie shows at least a basic understanding of why people buy physical. It's not just about collecting stuff and having a glorious shelf to show off. They're afaid of data-loss, of actually loosing their game and not being able to play it anymore. Physical is safer because it wont just vanish off the face of the earth if a publisher says so (looking at you konami). His quote implies that he understands that. So an actual physical NFC key to a digital game is not very likely IMO since it would accomplish nothing to relieve those concerns. It's literally just a collectors Item.