Square Enix had a stage presentation where producer Yosuke Saito showed Dragon Quest X running on Wii U. While Dragon Quest X is an online game, the part Square Enix showed during Tokyo Game Show was not connected to the Nintendo Network.
Saito demonstrated how players can send the game graphics from the TV to the Wii U gamepad while you’re playing it. The Wii U version has been upgraded with HD graphics. One of the presenters pointed out the shadows in Dragon Quest X for Wii U show the shape of a character while the Wii shadows are just circles. (The screenshot is from the Wii version, which is currently out in Japan.)
Wii and Wii U players will be on the same Dragon Quest X server. Saito explained because of this the content for both versions of Dragon Quest X will be the same. You can transfer your character from the Wii version to the Wii U version. Dragon Quest X for Wii U will still have a monthly fee for Wii U.
When’s it coming out? Square Enix didn’t announce a date for Dragon Quest X on the Wii U or the Wii U beta test which comes as a bonus if you purchase the premium Wii U console.