Just as Kevlar is stronger than steel, per pound, but they can’t use it to replace metal, it could turn out to be the same as this wonder material.
It may not be able to replace steel, but they could thin the steel further and use this plastic to provided added protection.
The may not be able to replace an aluminum fuselage, but they might be able to half the thickness of it and then coat it with this material.
Steel has approximately twice the tensile strength of aluminum...if this material could be used to completely replace aluminum in airframes, that would be an amazing innovation.