I have heard these kind of news for a while now. Fungus breaks plastic. Worms eat plastic. Nothing ever seems to happen to plastic though. Why?
If you had nothing to eat you'd also give plastic a try, and you could miraculously be the chosen one who can break down plastic, but you'd switch back to normal food as soon as possible.
If it's bacteria, then soon the entire world will be full of plastic-digesting bacteria. If it's fungus, it will start to appear here and there at random.
These generally won’t occur outside of a bioreactor, so you’re not going to see them attacking random plastics in your house.
Edit:
This question is serious. If this fungus would eat all that plastic, this would introduce a huge amount of new life in the ocean with unknown effects to the ecosystem. We would replace one problem with another.
I assume/hope that it doesn't turn/get converted to a plasticofungi that cannot be eaten by fish/etc. This would only reshape the pollution, not eliminate it.
I didn't find an answer to this in this specific article; I hope it will be covered somewhere else.
If we could break down the molecules ourselves we would have done it already, but it's not easy to do that. That is why we benefit from these natural occurring organisms that break them down and leave a more useful byproduct (to us). Although nano technology can eventually give us the ability to do this in a controlled way.