The Bethesda Softworks Forums have technical details for The Evil Within, offering discussion of the recently revealed specs for the survival/horror game. There is also a discussion of the game being locked at 30 frames-per-second and a 2:35-1 aspect ratio, even on PCs, though there will be unsupported options to unlock the framerate and play fullscreen. Here's word:

What's the status on the game's framerate and aspect ratio?

Shinji Mikami and the team at Tango designed The Evil Within to be played at 30fps and to utilize an aspect ratio of 2.35:1 for all platforms. The team has worked the last four years perfecting the game experience with these settings in mind. For PC players, we’ll provide debug commands on how you can alter the framerate and aspect ratio, but these commands and changes are not recommended or supported and we suggest everyone play the game as it was designed and intended for the best experience.

Does the game support 4K resolution?

Yes. The engine can go even higher if you’ve got a monitor and video card that supports it.

Can I disable the letterboxing?

The letterboxing (a 2:35:1 aspect ratio) is used for gameplay purposes, as certain elements display in the black areas of the screen. On PC, you can turn off the bars and force the game to render full-screen. However this option is not supported. We’re keeping the ability to turn off bars as a console-only command that we will share at launch