This here is a video of New Super Mario Bros. Wii in 1080p, thanks to the wonders of emulation. (I had completely forgotten about the Dolphin emulator!) If there were ever a reason for Nintendo get off its backside and fully commit to the Wii HD, this is it.
You really ought to go to YouTube proper to see the video in the highest resolution possible.
Wii HD. Make it happen, Nintendo.