One really bad physical monitor. At 16 pixels per degree, you're at one third of a plain old 96 dpi reference screen.

Imagine if those nice 24 inch monitors had a resolution of 700x400. You can have n of them, but that is not going to make it good. And your field of view is pretty small at the same time.

Edit: Oh, that's a Vive Pro. Reduce everything 30% more for a Vive.