I don't think they should be console players, we haven't had 60fps as a standard framerate on consoles since the OOOOLLLDD days lol. I'm sure racing, fighting, sports and most MP shooters will still go for 60 like they do now but these big AAA blockbuster games that want to show off visually will probably still opt for 30fps. This is the thing, when people think next gen they always think visuals first, showing them almost current gen looking games running at 60fps isn't going to excite people, showing them something that looks like this will.
Also this was a playable tech demo, they didn't have a team sitting there working on it for years like a developer would so I'm guessing devs could tinker around with it, focus on some things more than others, sacrifice a little of the visual "wow" factor and still improve performance if they wanted to. Looking back at the UE4 demos for PS4, Sony's first party studios all surpassed the quality of those graphics fairly quickly, so I'm guessing they'll be able to do the same with this in time.
This does get me excited to see what Guerrilla's next game is going to look like, Killzone Shadow Fall for all of the knocks on it as a game still stands out visually today and Horizon only upped the wow factor.