Last year's demo wasn't just NSMBW upscaled. It was already running at native HD resolution with higher-res models and completely new levels. Much like when NSMBW and SM3DL were shown at E3, I expect some of the levels we saw will make it into the final version. Yes, they could improve the graphics some, but I'm not expecting significant changes. Though I do hope we see some more interesting use of the Wii U functionality, it's hard to say what they'll do with this game since the demo's only official purpose was to show the game cloned onto the remote screen. From a practical standpoint, the NSMB series proved to Nintendo that they don't have to make drastic changes to and it's still guaranteed to fly off the shelves. Yeah, I wish they'd do more stylistically, but I don't mind too much as long as the levels are well-crafted. NSMBW had this, but NSMB did not.