I was in the cockpit of a new aircraft (767, I think, but can't recall for sure) at the FedEx facility in Indy they were putting in a proprietary FLIR system for landing in 0/0 vis. Add the laser defense system and some rockets and it's ready for deployment.
It's not that good. Nothing gives us 0/0 capability, especially not the FLIR (we call it EFVS--Enhanced Flight Vision System). In fact the EFVS is pretty bad in wet particulate (cloud/fog/rain). Where it really shines is in dry particulate (SMOG) like is normally encountered in places like China and India.
That notwithstanding, the EFVS system gets us two things.
1. We get to lower minimums for an approach. For instance, if a CAT-1 ILS requires 1800 RVR on the plate, but we have an operational EFVS, we can shoot the approach legally if the RVR is being reported as 1200 RVR.
2. We can descend to 100' above TDZE using the EFVS image. Typically, at DA if you can see the laundry list of required items (approach light system, REILs, threshold lights, etc.), you can descend to 100' TDZE, where at that point you need to be able to see (another laundry list of items), then you can land. With the EFVS installed and operational, we can get to DA, see the list of items
in the EFVS (not natural vision), and still descend to 100' above TDZE. When we get to 100 above, we still need to see the same items using natural vision as we would without the EFVS.
So, it's helpful mostly for guys flying into places that are CAT-1 only in order for them to have a better chance of getting in and not diverting, but nowhere close to 0/0 capability. In my airplane, to the airports I typically go to, if the weather is that bad, I'm doing a CAT-3 autoland (but still use the HUD/EFVS for SA).