PS4 was the focus of the second night of 'Video Game Week' on Tuesday's episode of US chat show Late Night With Jimmy Fallon.

Mark Cerny, lead system architect on the console, used the four-and-a-half-minute slot to show off the console and offer a hands-on demo of Knack, the PS4 launch game he's directing.

Knack is a story-driven family game in which mankind turns to an unlikely hero to protect them from invading goblins. Knack is only three feet tall, bt he grows and transforms based on the items he picks up and smashes in levels.

Cerny described it as "kind of a mash-up between a Pixar-style animated movie and a character action game".

He also said of PS4: "It's the most powerful videogame console ever made. We were targeting about ten times the performance of any previous system.