It's been confirmed for awhile.
Weather its a delayed or simotanious release i wouldnt have aclue about.
And an MMO wont push the limits on either system, theres just to much data to be used @ once to be able to push the Graphic specs.
Only issue that may come up, is the same one with XI, and thats the 2 networks clashing.
360's FFXI freeze issues have nothign to do with the actual system, its the fact that the game has to go through 2 networks.
Either way, more audience the better, stop fighting over which console is better and cheer for XIV over WoW. Geez were all on the same *** team -.-