Interestingly, the backing by real assets to make it a stablecoin presents a regulatory issue: is Libra a security?
I will guess the SEC will answer 'yes' and the CFTC will not object because they really don't want to regulate it. But, since there is not the manipulation objection that seems to knock down bitcoin-backed-securities (like ETFs), I will also guess the SEC will mull it over for a while and then tentatively approve it. Then will come the 200 page prospectus, enriching all the lawyers. Be sure to read it before paying for your pizza.
BTW, BTC just hit $10,750. Seems like Libra must be driving a lot of the enthusiasm. Now (counting all the alt-coins), we have n+1 solutions in search of problems. Well, it's certainly fun to watch.