The passing of the 2.8M stretch goal added George Ziets, the creative lead on Neverwinter Nights 2. With the passing of $3M in funding, Strongholds have been added. According to Obsdian, "Some of you wanted something that went beyond the standard player house, allowing you to take control of a full stronghold and its surrounding lands. Well-done strongholds provide players with the ability to make large scale changes, undertake special quests, customize the contents of the stronghold and the surrounding environment, and engage in light strategic gameplay between adventures."
The next stretch goal is at $3.5M, which is doubtful just 45 hours left at the time of this articles writing. It will add a second big city: "We're going to have one big city in Project Eternity. Would you like two? If you take us on an exciting adventure to $3.5 Million, we will take you on an exciting adventure to another big city."
Obsidian also released a new Kickstarter video discussing the Lore of Project Eternity.