[Update: As per the Nintendo of America Twitter, when two GamePads are activated, they'll both run at 30 frames per second, half the default 60 frames per second.]
Last year, when Wii U and the new controller were both unveiled at E3, people began to wonder aloud, "Would Nintendo's new console support more than just one new controller?" Nintendo itself was a bit wishy-washy on the subject, but we finally have an answer ... and the answer is yes.
Confirmed by Reggie Fils-Aime at the Nintendo's E3 press conference, Wii U will support up to two Wii U GamePads when the system launches. So take a deep breath, everyone, and relax.