Really the key for me is being able to explore a futuristic, but not space-oriented RPG. Most RPGs revolve around either some type of fantasy (Witcher, Dragon Age, Ni No Kuni, etc.), post-apocalyptic (Fallout, Wasteland 2) or space themed (Mass Effect, Star Wars:KOTOR). The closest we've come to steampunk that I can think of is Deus Ex (barely) or Shadowrun. That thematic rarity along with CD Projekt's improvements in style and scope between major releases should make this a very intriguing one to explore. Which is what I tend to do as a completionist gamer - explore every nook and cranny of the world that has been built.