In a similar fashion to Steemit but on EOS your utility is RAM, CPU, NET and Voting. The vision for EOS is to have decentralised applications built on top of EOS. These applications will need RAM, CPU and NET to function therefore your EOS tokens are used to stake for CPU and Bandwidth and to buy RAM. Similar to Steemit you will also be able to have a voting say for each of your tokens - these can be used to vote in Block Producers, workers proposal projects and to vote on changes to the system with a referendum smart contract.