WildStar, why not let him take you on an adventure?
The latest WildStar teaser is just past the break, and it hints at how adventures will work -- players will be put into a virtual construct wherein they can choose how to proceed, with consequences depending on which choices are made. They're also replayable, allowing groups to go back through and try different choices on the second time around. Click on past the break to let the Caretaker explain it in his own words... but you might want to sit a little further back from your monitor. He's a bit on edge.
[Source: Carbine Studios press release]