There are a lot of people experiencing video games and/or a Nintendo console for the first time.
There are also many great Gamecube games out there to be played that they may never get a chance to play unless they look through the pre-owned section of game stores as they are certainly not going to come to the VC.
Maybe Nintendo and other companies could re-release some of there games but at a budget price and with 2 or 3 games on one Wii sized disk (if they will fit, I'm not sure what the capacity on GC Vs Wii disks is)
They could still be in a Wii labelled box but be called 'Gamecube classics for Wii'