You inherently get a better sense of the pattern since you can use stereoscopic vision rather than parallax+movement. It could give you a better sense of what a complicated shape looks like. When you look at something complex enough[1] it helps to get as much information as possible. The eyes alone are not optimal for grokking it, even when the shape is moving around[2].

[1] https://images4.sw-cdn.net/product/picture/710x528_583780_19...

[2] https://www.youtube.com/watch?v=K9YAAS0cZ_w

also all hail king Quilez, master wizard