Zenimax Online Studios just released an official "Gathering & Exploration" video for The Elder Scrolls: Online on their official YouTube channel. It looks like you will be able to gather and craft things in ESO just like you have been in previous Elder Scrolls titles. Crafting potions, weapons, and armor is a big deal in Elder Scrolls games, and it's nice to know that Bethesda will not stray away from this in The Elder Scrolls: Online.
The Elder Scrolls: Online is still in beta, and will be holding several beta events up until the official release. If you haven't signed up yet, there's still a good chance you could gain access. If you're interested, head over to the sign up page here.