Does Killzone 2 reflect the PS3's full potential?

It's always fascinating to look back at the early shots of flagship games for new consoles – to dream of what might have been, to rue what wasn't, or even to make grunts of sheer surprise that it did actually work out as planned.

As a case in point, today sees the release of Killzone 2 – the current great white hope for the Playstation 3, and sequel to the first-person shooter that was once mooted as the Playstation 2's Halo-killer.