The Wii U tried to bring the DS to console, but there was one major limitation that kept it from being used the way the DS was: human eyes cannot focus on screens at different distances from the eyes. The DS only worked because both screens were right next to each other.

The one thing the Gamepad could do that worked quite well and deserved to be explored more was asymmetric multiplayer. But at the same time, it felt like it was an era too late to be a big deal - giving players separate screens is something we can already do via online multiplayer.