I think Gibsons comment was a bit.. let's say neither well timed nor really thought through. I do think he is right but at the same time, why say it? The point is, every game will have a GTA vibe at first glance that features a city, vehicles and violence if your focus is to show that too. Of course you can make a trailer at night and set a different focus but I think the point was to say: This is the place you are playing in, no it's not just night time, look how diverse the characters are from fat guys to kids, everything is in there, you will be able to drive and there is a stark contrast between the high society and the peasents, while Vala Morgulis everyone can be a victim of the fights in this brutal world. Also there are fun activities like kicking people on the gr- err.. kick-boxing and basketball. I mean what was anyone thinking years back and after the Witcher 3? That this would be Deus Ex like small and tiddy? Of course not and the information from the Demo are already showing that this is different to GTA even though it has similarities that are absolutely inevitable for this kind of game - which is nothing wrong to begin with. Mafia back then was very similar to GTA as well and was for most part or very well still is my favorite city sand box game and was also very story-narrative driven.
I don't think though that Gibson is looking too down on the game here. He also said a thing or two about Shadowrun but it never felt like he was really angry, just a tidbit arrogant maybe. But he might underestimate what Cyberpunk does here. I bet Neuromancer is mentioned more the last 72 hours than it was for years and yes, I bought the trilogy monday and I am reading it for the very first time. Without Cyberpunk it sure would've take a way longer time. I am just at the beginning but I really see how Neuromancer had such an impact (together with other works), beacuse from the first page on it's Cyberpunk and doesn't feel just like some proto-work that just inspired what we know today but it really is Cyberpunk.
I am pretty sure I am not going the only one experiencing Gibsons work thanks to Cyberpunk as same as Sapkowski and Glukhovsky profitted from Witcher and Metro (even though Sapkowski denies it and Glukhovsky is calling him an arrogant motherfucker for this who is wrong). Of course Pondsmith is going to profit too, especially should there be a 2077 edition of Cyberpunk 2020.