I think STEEM is going to always be the oil that the "engine" needs to run. We can build all kinds of communities and dapps on the platform, but we still need STEEM POWER for the resource credits and account creation. I think in the future we'll see communities holding the majority of the STEEM while end users derive their value via tokens and rarely hold STEEM. With the addition of resource pools, they won't even have to as the dapps they use will be able to basically pay for the resource credits for their users.