Laws should be changed to declare a patent abandoned once the owner is no longer using it.
One has to wonder who, if anyone at all, owns the Polaroid patents.
The other side of patent protection is one has to defend the patent. So if Impossible were to use Polaroid's patents, whoever holds the rights would have to be willing and financially able to pursue infringement in the courts.
And, there's always the chance the courts would side with Impossible.
But still there needs to be an abandonment clause.