The promise of a first person, deeply immersive, atmosphere-rich, cyberpunk, Witcher 3 quality story having, player choice driven, highly customizable, RPG experience first and foremost. Set in a dense, vertical city (as opposed to a lower-detail, scale-based, sprawling one like most open world city sandboxes boast having.) Verisimilitude and density over sheer scale and numerical quantity.

That's it. Everything else being speculated beyond that is just gravy to me and not required for me to get what I want out of it.