I hope you're being sarcastic, as quad monitors are as flawed as dual monitors, where the centre of view lays under the bezels.
The trick is that you don't swivel your head between monitors. You still use the mouse to look, and focus your own eyes on the centre monitor.
The two side monitors fill out your peripheral vision, and you use them as if they were your avatar/character's peripheral vision.
A person's field of view is about 170-180° and any given game set in the first person perspective should have a field of view that corresponds to how much space the monitor/television takes up in a person's arc of vision, as the window into the game world.
Console games are set to something like 70° because that is the arc of your own vision the television takes up while sitting a several feet away.
Ideally PC games are set up approaching 120° as when you're at your desk, a foot or two away from the monitor/television that is how much vision it takes up.
With three monitors/televisions hooked up, you are able to fill a person's entire field of vision with game world, and start making use of the "seeing things out the corner of your eye" and other natural vision, peripheral phenomena.
Of course, some people, myself included, have set up their PC to be able to display on our lounge TVs and use/browse and game on them from the comfort of our settees too, so being able to adjust FoV to take into account PC gamers playing from either couch or desk is only sensible.