Roy said Eidos wants to take advantage of as many new, next-generation features as possible, and this includes the DualShock 4.
"For the DualShock 4, we use the light bar to reflect the light gem in the in-game UI, which indicates if Garrett is in the shadows or not," Roy said. "It creates a nice feeling when you play in the dark to see it illuminate or darken as you move through the environment."
The DualShock 4's new touch pad will be used for menu navigation and as a "more intuitive" way to perform actions like manipulating the in-game map or selecting weapons, Roy said.
Roy also spoke positively about the DualShock 4's new "Share" button. Being able to share images and video is especially meaningful for a game like Thief, Roy said.
"We think it’s a great addition, especially for a game like Thief. We give a lot of freedom to the player, and we work really hard to create a systemic AI that will let the player find creative ways to play," Roy said. "Sharing those moments will showcase how they solved various situations--and we're pretty sure that players will find ways that impress even us."
Lastly, Roy said he is encouraged not only by the DualShock 4's new features, but also by how existing ones have been updated for the new version of the controller.
"The best example of that is the motion control, which is way more precise than before," Roy said. "You can use it to adjust your aiming with the bow, and the level of accuracy we get with it is really impressive."
Thief will be released on February 25, 2014, for the Xbox 360, Xbox One, PlayStation 3, PlayStation 4, and PC. A Wii U version is not in development.
For more on Thief, check out GameSpot's previous coverage.