I think this is a lets wait and see statement.
Yes, it is coming...and Nintendo is trying to figure out how best to do this. Of course each virtual console game will have to be slightly reprogrammed to be able to work with the Gamepad...but I hope that doesn't mean Nintendo will try to get greedy.
Personally, I look at this in 2 ways, both are positive in different ways.
1) Nintendo is figuring out how to best implement the virtual console transfer, and it will be easier to do, once Nintendo has a bulk of the Wii VC games and such transferred over to the Nintendo Network account, and everything is smoothed out and in place. Then Nintendo can implement the new Virtual Console system and allow you the choice to transfer all old Wii VC games to the newer standard and game pad support. Simple and easy, but necessary because if anything is broken or not in place for a smooth transfer gamers will be upset...and Nintendo already screwed up by not having an account based system from the beginning.
or another option...less desirable is this.
2) Nintendo is making a new VC system structure and this new system may include new functions for the new system, that would warrant a new purchase price. Nintendo will include Gamepad support...but perhaps Nintendo will also add online play support for classic games. This alone would justify a repurchase price. Also Nintendo could do other minor upgrades like adding 4 player support to Super Mario Kart or something...unlikely but still possible. All of this could be done so Nintendo could justify reselling the game, and I think gamers would support that.