We can create genuine themes for the Wii U menu now : r/WiiUHacks
Bought a Wii on Craigslist to perform my very first hack and noticed a familiar icon. Looks like someone beat me to it ¯\_(ツ)_/¯ : r/WiiHacks
Finally plucked up the courage to back up my Wii collection on to the WiiU. Made many custom icons/launch screens, but worth it in the end. Thanks for the many helpful comments