It depends what you mean by "practical", though. If you mean "practical for use as a dense 3D reconstruction technique" then sure, it's pretty bad. If you mean "usable under an incredible range of lighting conditions and situations" then I'd say it's practical.

Edit: IMO binocular vision is probably more to do with redundancy than depth perception. If you damage or lose an eye, you can still operate at near full capacity. Losing vision 'in the wild' is a death sentence.