● Metropolis: release of the Mist browser, expected summer/fall 2016 ● Serenity (Ethereum 1.5): release of the proof of stake (Casper) version of the blockchain, also including Ethereum Improvement Proposals (EIPs) 101 and 105. Expected early 2017. ● WebAssembly release (Ethereum 1.75): faster virtual machine. Expected 2017. ● Ethereum 2.0 (yet unnamed): initial scalability release. Expected late 2017. ● Ethereum 3.0 (yet unnamed): unlimited scalability release. Expected late 2018