User blog comment:Kaminoman/New Skyrim Info!/@comment-3076045-20110321171842/@comment-1726879-20110415201150

I think it's more referring to the random quests and possibly storyline quests slightly. They'll most likely still keep the ability to join all guilds, otherwise a balanced character quest-wise would not be possible.

My interpretation of what has been said is that a random quest may be given to a warrior from a warrior-like NPC, whereas a similar quest may be given to a thief from a thief-like NPC, etcetra, etcetera.

Also, they might make NPCs in the story give you different roles in a quest (ie. a warrior would be told to charge an enemy line, a thief/assassin be told to flank them in the shadows and kill their leader or sabotage enemy equipment, and a mage/ranger be told to get to higher ground and hold position while picking off the enemies). This is probably not too far off what they're planning. As I wouldn't think that they'd make thieves and the more "support" type classes charging into enemy lines and getting surrounded...