The PC version of The Evil Within has gotten a patch, that allows users to change some of the game's graphical settings. Most notably users can now remove the black bars and toggle between 30 and 60 fps caps.
The full list of improvement and fixes are:
Frame lock settings added
In settings, you can now toggle between a 30 FPS and 60 FPS cap.
Letterbox setting
UI toggle to disable the letterbox bars
Fixes gameplay issues when running at >30 FPS
Fixes for visual issues associated with removing letterbox framing
Achievements now work when console is enabled
Fix for game starting in windowed mode on first run
Minor localization fixes