Prior to the launch of the WiiU, Nintendo was questioned as to whether or not the WiiU would be able to upscale old Wii games and they responded that it would not have that ability.
However, according to gamers who have tried, there is a definite difference between Wii games on the Wii and the WiiU. While the games have not be converted into 1080P, the image appears to be much sharper than it was previously.
IGN recently posted a video showcasing the difference between the two using The Legend of Zelda: Skyward Sword, which is an already visually appealing Wii game. The link to the video is posted below:
What do you think? Is the difference noticeable enough? Have you tried your own Wii Games on the WiiU yet?
Article from Gamersyndrome.com