A currency is only valuable if you can use it in a way or another. Steem has already a big advantage over other crypto currencies since it has a whole ecosystem of websites and services linked to it. Not only are there websites and services, there are also a lot of intelligent people who can develop and imagine new ways to implement the currency.
A nice idea would be to offer a market place for digital goods (music, pictures, ebooks, courses, etc) maybe on steemit itself, where users could sell and buy from each other and just send the product by e-mail for example.