The Wii U Will Make Music/Fitness Games Better. Nintendo blatantly stated this backing it up with such games as Just Dance 4, Sing (working title), Wii Fit U, Sports Connection, and Your Shape Fitness Evolved 2013.
OK, Nintendo. Prove it!
(E3, Just Dance 4, Next-Gen, Nintendo, Sports Connection, Wii Fit U, Wii U, Your Shape: Fitness Evolved 2013)