I remember the difference in visuals in Mario 3d World E3 trailer and last trailers. If the difference between this teaser and the final game here will be the same - I'm OK with it.
Keep in mind, when games are shown for x1/360/ps3/4 they have beatiful teasers, then the trailers for them become worse and worse in graphics department. And real gameplay usually looks nothing like first showing.
Nintendo have a different approach to this.







