To everyone who is concerned DAI may be too much like Skyrim:
Watch the video where the Inquisitor and Cullen end up playing chess. Have you ever seen such a lifelike scene in any TES game? For DAI, Bioware has taken inspiration from Skyrim no doubt - how could they not, seeing how Skyrim sold 20+ million copies - but that doesn't prevent them from telling a good story. I have the impression they're going back to the roots in all the best ways, namely to the BG series, which had a similar balance of free exploration and story content as DAI appears to have.
Also, an open-world game with an underpresent story like Skyrim (the story isn't bad, it's just not present for most of the game) won't appeal if it can't be modded like Skyrim. Bioware has to know that, and it was their stated intention to tell a really big story in DAI.
I don't think there is any reason to worry. Personally, I'm so very glad that we aren't on rails any more and can explore the world more freely than in any other game since the IE games (don't know NWN, it may qualify).
Edit:
BTW, I have sunk 200+ hours into Skyrim. It has a fantastic world, but without mods I wouldn't have stayed nearly as long, and it doesn't hold up to the best TES game, which was Morrowind (apart from the bugs, but that's Bethesda for you).