Chibi Reacts; Gamecube Games Disks Will Not Be usable With The Wii U

So I just read this article on ScrewAttack that you won't be able to use your GameCube game disks on their new console the Wii U (read article here). That's a bit of a let down as there are some good games on that system like The Legend of Zelda the Wind Waker and Super Mario Sunshine.