For cartoons like Kirby it means more pixels and smoother edges...thats about it. Its part of the reason games like SMG look fine already, because the current resolution is fine for those things (on non-gigantic TVs).
Basically with Kirby you have will be getting better lines and more pink pixels =P
Its when you start going for extreme detail and photorealism that huge resolutions and complex shading and lighting techniques are needed. This is why Nintendo understood that when it comes to graphical appeal you don't need just raw unadulterated graphics power but art direction, palette direction, and a deep understanding of the way shapes, colors, shadows, and lights all effect a persons perception of the mood and atmosphere of a game.
In essence, with a little thought put behind all of these choices you will often find that less is more when it comes to graphics.








