Right now, filecoin is only a whitepaper. There's no implementation yet. Possibly never.

Now, Filecoin seems to, from the whitepaper, gotten it right. We all know of the tragedy of the commons. Their solution was an elegant way around that, by granting filecoin to whom share their bandwidth and local storage. And then, others will take your coin for duplicating files you want copied.

But right now, it doesnt exist. And IPFS still works flawlessly.