Speaking briefly on this week's Famitsu, Fumito Ueda said that his new ICO 3 game for PlayStation 3 will be based on physical connection, similar to his previous two games, ICO and Shadow of the Colossus.
ICO was based on two characters holding hands and the core mechanic in Shadow of the Colossus was holding onto a colossus. Both of these functions were executed by pressing and holding a button. A similar form of contact will be present in his new game.
This aspect was already suggested in a previous interview Ueda had with Game Watch, just after finishing Shadow of the Colossus.
You can read more about it, and all the other things we know about 'ICO 3', in this interview http://www.tigmagazine.com/puzzletogether.html, which was put together by piecing all bits of information we have on the new game. More PlayStation 3 News...