What's so special with this game compared to Skyrim, Torchlight II and others where you run around in a big world?
For me it's because the game is more or less a new Ultima game. I played Utlima 2 back in 1982 and 4,5,6 as they were released, 7, 8, 9, and UO years after release. At the time they were the best rpg I had ever played. I am hoping to recapture that feeling with this game. That said Skyrim kicks ass and I play the crap out of it. 
Today they comfirmed single player requires no onlinen connection, no micro-transactions for single player (will be a game shop for online), and no DRM for kickstarter supporters. Main quests will be nearly the same for both online and single player.
@Gandhialf I should have jumped on Wasteland 2, hell I played the first one back in the day. I think I will for Torment, Planscape is a great game.