Sure. What I meant was, if you want to use Steem from your phone and spend it, you'll have to have your private key ready to use on your phone. With other cryptos, you can just have another wallet with a small amount of funds in there, but with Steem it's not always so easy to make another username.
Yes, there's definitely a lot of potential to build stuff on top of Steem, and it's brought a lot of newbies in with a UX that's more familiar.