Nintendo have today elaborated further on their plans for the Wii U Virtual Console during a very recent Nintendo Direct presentation.
The service will launch on the Wii U eShop this Spring and with it will come a System Update. Both NES and SNES games will be available at the service's launch and other consoles will be added to the lineup at a later date.
The ability to save your game's state will also be available in the re-releases. Here is what Nintendo had to say about the new service...
A spring system update will add Virtual Console software to the Nintendo eShop for Wii U. The service will launch right after the spring update and will include a selection of NES and Super NES games, with Game Boy Advance games to be added in the future. The prices for NES and Super NES Virtual Console games for Wii U will be the same as they were for the Virtual Console on Wii. People who have already purchased the Wii version of a certain NES or Super NES Virtual Console game and transferred it to their Wii U console can buy the enhanced Wii U version of the same game for the reduced price of $1 for NES games and $1.50 for Super NES games.