PC Gamer has a good breakdown of what they know. They say it looks like Fallout meets Bioshock meets Firefly and that's a pretty apt comparison.
The big thing for me is the focus on player choice, which I feel Obsidian does very well.
In addition to the trailer, Game Informer has a brief gameplay video that shows the game and makes me want to play it even more. It feels like a modern take on more classic First-Person RPGs: https://www.youtube.com/watch?v=J3cRpYGVPsU
Let me say that I adored Fallout 4, but it looks like a lot of the choices in this game were direct responses to criticism Fallout 4 received.
You can see PC Gamer's coverage here: https://www.pcgamer.com/obsidians-the-outer-worlds-blends-firefly-and-fallout-into-a-bold-open-ended-sci-fi-rpg/