I started the game, so far its quite visual, as I know this is the console forum, but being a merged thread, I'll post my impressions on my Razer Advanced (2019) running a RTX2070 mobile and a egpu rocking with a RTX 260 super. Don't worry no spoilers
I have the egpu hooked up and just moving around in the city at the very beginning, I'm seeing frame rates in the low 30s with the settings to ultra. I think I'll disconnect the egpu and see how the RTX 2070 works, as it won't have the bottleneck of thunderbolt interface. The downside of using the discrete GPU is heat/fan noise. My laptop fans don't even come on with the egpu.
I've played with the various settings to improve frame rates but even at the lowest settings its a very demanding game. I've not gotten into any part of the story that I need to be fighting/shooting or running and so the lower frame rates feel smooth. Playing the recent Tomb Raider games which can push a computer, I found low frame rates to make the game feel janky, that's not being noticed here (at least yet).
Doing a bit of googling, you can choose nomad vs. street kid vs. Corpo, each choice opens or closes various dialog choices and it seems it gives you options. I went with street kid initially, but I may start a new game off the 2070 and go with nomad to see how that starts off.
One thing I heard multiple times is don't rush through, this isn't a race to the finish, enjoy the game, and take your time. I'm actually doing that and seeing what works best right off the best. I'll let others finish up and provide their insights