What's the use of this debris?
OK, let's assume, it really is a part of the missing 777. Now what?
We know it must have crashed - but we knew this early March 2014.
We can safely assume it crashed in the Indian Ocean, probably west of Australia - sounds familiar from early March 2014.
The only "good" I see in it is that it gives the real search mission an emotional lift in that something tangible has been found. As for the conspirators, they will find a new theory that would be funny had not so many People died.