User blog comment:TheBlueRogue/E3 2013: The Elder Scrolls Online/@comment-62.238.6.174-20130607081247/@comment-7824803-20130609051421

It's true, but you're thinking of predefined classes the wrong way. In TESO, your class doesn't define what you can wear or wield; it only defines the abilities you have access to. Basically, it's less of a pidgeonhole and more of a soft mould.

The Sorcerer class, your so-called mage in TESO, will consume Magicka to use his abilities, but to swing his weapons, he'll consume Stamina. Since everyone can unlock a secondary weapon after level 15, the Sorceror could primarily use a Destruction staff for ranged AoE attacks and, if things get messy, switch to a 2h or dual-wielded melee weapons. He could just as easily use a bow as his secondary weapon.

Beyond Sorcerors and Destruction staves, there'll be spells that can be cast by anyone, even while wielding a sword and shield; that is, you won't require a free hand to cast a spell in TESO. You can cast one while holding a shield. I'm 90% sure it works with dual-wielding as well, though I don't expect it to work with a bow or 2h weapon :P.