According to managing Director at Guerrilla Games Hermen Hulst, the upcoming PS4 launch title Killzone: Shadow Fall will feature "intense tactical gameplay on huge maps". He also started that the game will make use of the DualShock 4 touchpad which will let you control an AI companion.
"We have this robotic companion that helps you out and gives you an attack mode that lets you zip-line across the map, et cetera. So we’ll use the touchpad to control that."
The game will also make use of the speaker on the DualShock 4 gamepad, along with the headset jack. This could mean there will be a way to issue orders to your AI companion, but this has not been confirmed.
Killzone: Shadow Fall is set 30 years after the events of Killzone 3 and will be the sixth game in the Killzone series and the fourth for the consoles. The game will be released exclusively on the PlayStation 4, Q3 2013.