I received the above email from Nintendo earlier today. What caught my eye was that classic titles will feature enhancements such as 'HD resolution'.
I don't think I've seen this reported anywhere, although I can't imagine we'll see the benefits of this until Nintendo 64 and Gamecube games start appearing in the future.
From what I understand, classic games on Nintendo's first HD system, the Wii U, ran at the original non HD native resolution.
Could we eventually see official 1080p versions of Super Mario Sunshine and Super Smash Bros Melee?