I think Sia has a lot of potential to be a game changer and its probably one of my favorite altcoins [along with Steem and Gridcoin ].
I don't think the price is going to every be massive due to the amount of coins [27.30 billion Siacoins] but the tech is going to be great, if everything goes to plan.
I am mining it at the moment and probably will until the asic's come out but thats going to be a while.
Just imagine that you can upload you videos to Sia and then stream them! that would be pretty awesome.
and the best thing about Sia is that is decentralized