To pick up on Venji's post, a port of Skate would mean it's bound by whatever development rules and limitations were in place for the PS3/X360 version would carry over to Wii and would be made worse because of the natural limitations of Wii technically.
Being developed from the ground up on Wii allows the developers to no longer be bound by those limitations which will allow them to make it better from a technical standpoint.
The rEVOLution is not being televised







