Filecoin is a huge disappointment to me. IPFS is fantastic technology, but the main developers getting sidetracked with yet another scammy ICO is the last thing we need.
It's interesting to see many of Filecoins promises realized already in alternatives like Sia or Storj, but Filecoin still takes the hype, despite not having anything released, let alone anything superior... I guess because it's by the IPFS developers and had a big flashy ICO?
And is intended to run on an IPFS network. After reading the replies to this comment, I started looking into Sia, and wanted to try it out, but it seems that I first have to buy some Sia before even being able to become a host (!), which is an instant turnoff.
At the same time, I am already able to try out IPFS and have been able to develop apps using it for quite some time. I am not sure what the plans are with Filecoin, but IPFS also has a default-public (hosting) use case, while as of now Siacoin has private-only.