ANet talks a lot about shaking up the holy trinity, and i wanted to take a closer look at one of the play styles available: Control.

Much like the “tank” from more traditional MMO, i.e. WoW, the controller will be responsible for mitigating damage. The thing that set the controller from a “tanks” is that you don’t have to get smashed in the face to do your job. For instance, a necromancer with two daggers can use, Dark Pact to bleed and immobilize a selected foe, then use Enfeebling Blood to blind, poison and weaken foes in an area. Dark pact makes a good single target control skill, that can be use in situations were you want to keep one target in place, like a Bloated Creeper, away from your allies. While Enfeebling blood seems to be more of a area control skill that lets you blind a group of smaller, faster hitting foes.
There are a lot of conditions that can be placed on enemies, Cripples, Freezing, Immobilization, Sinking, Floating, Blinding, Dazing, Weakening, Fearing, Knockback, Knockdown, launch, pulls, stuns and traps. Their are alot of ways to debuff enemies, and many skills have multiple effects, for instance Magnetic Grasp pulls a target to you and immobilizes them, or Fear Me, which both fears and weakens foes.
You don’t have to wield a sward and board to be a control, area control, debuffing and crippling your foes works just as effectively as getting smashed in the face. But for those who love to feel like their more actively engaged in the controlling, you can always distracted the enemy. ANet has said several times that their treat system is fairly straightforward: The closest enemy is the target.
The Control play style looks to be my personal favorite; with a variety of debuffs, skills and a simplified threat system, tanking has never looks more appealing to me.