Couple of points of interest for people who maybe haven't been totally following this game.
1) It's not true open world. As in, full open world, the same way Elder Scrolls and Grand Theft Auto are. What it is instead is regional open world, so instead of one sprawling cohesive landmass you'll travel to a number of locations in the Dragon Age universe and each is built as an open environment. I believe regions will become accessible as you progress through the story and you'll be able to change between them, but yeah. Instead of walking from one area to another totally seamlessly on a relatively small sample of continent that houses the entire game, Inquisition has you travelling to various regions of the content that are each built with their open world landmass.
2) It's not Origins turn based tactical combat. It's not fully Dragon Age 2. It's a mostly action driven game, with real time based defense and attack systems, that seem to play surprisingly like any standard real time action game. You can however pause the combat and bring up an overhead tactical map. This does not allow for true Baldur's Gate style turn based combat, but does allow you to strategise squadmate positioning and spell usage. From the PAX demo it doesn't seem to be a throwaway feature, but instead a pretty decent addition to the real time combat, as it allows you to better pinpoint and strategise spell usage, position range units, and other such stuff.