"It’s just a tiny vertical slice of what CD Projekt says is packed into the final game."
Source:
http://www.gq-magazine.co.uk/article/cyberpunk-2077-e3-demo
"Anyway, the road ahead is still very, very long as CD Projekt RED has confirmed that the footage which has been showcased behind a closed door was a vertical slice the development team had cut from a pre-alpha version."
"No, earlier. Therefore,
we show the game behind closed doors – this is not the final quality yet," CEO Marcin Iwinski said when asked about whether the game was in an alpha stage already.
"This is the most polished part of the game we have now, prepared in some sense to show it to people outside the company," he then added, hinting at the fact that CDPR really wanted to offer select press members and invited people something to reassure them the game is alive and kicking.
Source:
https://www.gamepur.com/news/29332-cdpr-explains-why-cyberpunk-shown-behind-closed-door.html
Witcher 3 downgrade:
Many other comparison videos just clicked on a random one. The game is still looks great but the demos looked way better imo.