While I was intrigued, and even excited, by the immensely well received Kingdom Come: Deliverance, this is really what I was waiting for. Frontiers aims to create a vast game world that encourages exploration, with various biomes and cultures. It's one of the few non TES games to offer such a play style.
Kickstarter: https://www.kickstarter.com/projects/railboy/frontiers-explore-discover-survive?ref=card
Steam Greenlight: http://steamcommunity.com/sharedfiles/filedetails/?id=242472205