It’s hard to make a judgement at this point, I am taking all the information with a pinch of salt. However, without doubts, Facebook is gonna be the largest beneficiary of it, if not the only one. People are gonna trade ‘real’ currencies for their. I don’t wanna be a pedant at this point, whether or not it’s a currency at all in the first place.
However it’s clear, it’s gonna come under massive scrutiny and probably gonna get banned for instance in India and China and other countries, who keep strict watch on their USD reserves. There is a legitimate case for ‘easier online payments’ and I had hoped Facebook Messenger would enable it, but in the fiat currencies like USD than their own.