There was 2 elemental demo's, the second one was pretty downgraded but people think of the first generally.Aside from maybe Uncharted. This gen was pretty good with the tech demos actually matching what was possible this gen. Nothing like the Motorstorm PS3 reveal.
You guys remember how amazing the Elemental demo looked?
Quantic Dream Dark Sorcerer
Square Enix Agnis Philosophy
With that I have no doubt Hellblade 2 will look every bit as good as the trailer.
I would say QD got close to their demo, Square sure as fuck didn't lol. well character models they did but the scale of that demo might not even be realistic on next gen.