So what else was I shown? Well, I was shown a trailer for a game not due out till 2009 but was sworn to absolute secrecy. Apparently, Sony just wanted to give a glimpse of what the console will be capable of.

In fact, the game is such a secret that when I mentioned the game to Phil Harrison last week he was unsure at first whether even to admit the title existed. When I explained I had been shown it under strict Non Disclosure Agreement terms he looked relieved.

I don't mean to be a tease - all I can say is that I was left speechless. If the footage I was shown truly is "in game", as told to me by the Sony PR people, then we could be on the brink of a step change in what games consoles are capable of in terms of story-telling and immersion.

And there I'll leave it. Feel free to speculate on what I was shown. I cannot, of course, confirm or deny what it was....