Per the announcement, the test network, dubbed Discovery, allows developers to start developing their decentralized applications (DApps). Furthermore, contracts hosted on the Discovery testnet will reportedly be immediately deployed on the Ethereum (ETH) network once Enigma has been implemented on the mainnet.
The author of the post further notes that the developers have been using and modifying the network for three months and are now releasing it as open source software. The Enigma network relies on the Ethereum blockchain for consensus, but it hosts independent smart contracts written in a different smart contract (Rust, instead of Solidity.) As well, Enigma smart contracts are reportedly capable of calling any function of any Ethereum smart contract.