When I played the Wii versions of COD I was genuinely surprised at how good they were, and using the Wii Zapper was the best way to play COD. It's a fair point to say that as the % of RAM available between Wii/PS3 and Wii U/PS4 is about the same and therefore PS4 titles should be able to be ported over to Wii U with some concessions made.
Does anyone know if it is possible for the Wii U to utilise more of its 2GB of RAM in the future with a system update?