LG launches 34-inch 21:9 curved monitor with webOS for computer-free access to streaming media and Office 365

Is it possible to buy large displays that don't have an OS on them? I don't need my display to be a computer.

Sounds like a Chromebook with extra steps.

You'd be better off buying a Raspberry Pi (or another SBC) and using it both as a DIY server and backup computer.