Well they showed off some gameplay footage a while ago: http://www.dailymotion.com/video/xkwfxf_dragon-quest-x-trailer-and-gameplay-footage_videogames
You select your command like in any other Dragon Quest. You do your command, probably in turn order. Then you wait until your turn, although it's hard to say if the game itself will wait for your turn, like if you just sit there not selecting anything, will others be able to continue on? The only really different thing, ignoring however the turns are formulated, is that you can move around freely in battle. Apparently this will let you dodge area of effect spells and things of that nature.
Given his use of a comma there, and the word "or," he is in no way, shape or form calling FF XIII and action-RPG. He is giving you three choices, action-rpg is one, FF XIII is the second, and turn based is the third.
That being said, there hasn't been a mainstream majorly popular MMO that hasn't used the standard auto attacks with spells and abilities, obviously with differences, but all following that basic formula. And I'm referring to Everquest, WoW, and FFXI here from what I can think of off the top of my head for the majorly successful MMOs. FFXIV was the most massive failure by a gaming company of recent history, both financially and fan base wise.
Emerald_Melios posted... There's no manual control of hirelings this time?
They haven't shown any yet but that doesn't mean we won't be able to. The party members in the footage may have been set to "Show no mercy!" or whatever. The "Follow orders" option may be available in the final game.
Apparently the Wii version is in beta so we may not have too long to wait before we get some solid answers!