If you were wondering what xBar meant, it means Cross(chain) HBAR. It is a network of validators relaying transactions between Ethereum and Hedera Hashgraph.
The first product created with it is called Wrapped HBAR. wHBAR is a token bridge allows users to transfer data such as digital asset ownership information between Ethereum and Hedera Hashgraph. Token bridges provide fast and secure connections for users to interact through.
To see whbar in action, check out the Wrapping Station. It is backed by a Hedera Contract and an Ethereum Contract. Source code will be released soon.