Nah.
I think the reason for all of this is pretty clear. We're seeing diminishing returns in the Polygon Wars. The PS3 can already push "enough." That flying thing in the SF shot you linked, there is nothing there that the PS3 couldn't do, in terms of building that model. And it could fake its way with normal maps and all manner of effects to make it seem like it's drawing more polys than it is. What we get from the PS4 is hugely better lighting and texturing. And yes, those are great, but they aren't what people usually expect from a new generation. They want MORE POLYGONS. More highly detailed geometry.
And duh, it does more polygons. But when you're showing off a scene that the PS3 could already do: namely 100% of the on-foot parts of the SF demo, it's not going to impress as much. But the shots that show SCALE, the flyover of the city, then you go "oh shit" because it's pushing far more geometry than the PS3 could ever hope to achieve. THAT'S where you see the generation gap. But on-foot in that demo, where all we have are new effects and textures and lighting on the skeleton of what might as well be a PS3 game? That's where it fails to impress as much.