If I'm understanding correctly. Killzone is being used as an example of a launch game i.e not impressive in scope or something?
Think a lot of context is being missed, apart from being simply a launch title.
They went from PS3 to PS4, different OS, totally different architecture, I'm sure the engine took more than a recompile and afternoon of optimization.
My point is what makes cross gen games easier, is actually what makes getting more out of next gen quicker possible.
- Tools same
- OS same (at least minimum expect the underlying OS to be the same)
- Engine same
- Architecture similar
So the isues with launch game development this time around is largely mitigated.
It wouldn't be years of research to take the same engine and do more on the CPU than is possible on current gen.
Same with SSD.
Before it took years for games because architecture fundamentally would change. Just not the case this time.
As a result, expect graphically at least for cross gen games to look impressive right away.