It seems the Wii can output HD signals… with a catch of course. The 720p screenshots of the New Super Mario Bros. Wii were captured off an emulator. That emulator is known as the Dolphin. With most emulators, the Dolphin’s system requirements are pretty intense. While we don’t promote the use of any piracy, the screens are more of a preview of what “may” come. It also shows the games were made with the ability to support the 720p graphics, so why the Wii was made to top 480p is still a question.
Dolphin is a Gamecube and Wii emulator. Most games run perfectly or with minor bugs. Games are playable at HD quality, up to 1080p. This is a remarkable feature the actual Gamecube and Wii consoles are not capable of. As an open source project everyone can commit improvements. The code is hosted on code.google.com. Dolphin is actively developed and almost every day new features are added and bugs fixed as well.