Veteran developer Mark Cerny, best known for Marble Madness, has debuted his PlayStation 4 game at the See the Future event, called Knack.
Knack seems to be a 3rd person action title in which the player takes control of a robot named KNACK, who is modular, and can increase its size with objects. The game seems to be a tech demo of how many individual objects the PS4 can show on the screen, as sort of a next-gen Katamari Damacy.
The game is presumably a launch title for the PS4 - we’ll have more info about it as we get it.