Prysmatic Labs has launched a test network for Ethereum 2.0 based on the Casper PoS protocol with staking support. The developers implemented the fourth version of the specifications for the main chain from the Ethereum Research team.
So, in order to run the validating node, you need to install the Prysm client, which is the only one for this network, and create a steak by sending Goerli testnet coins (3.2 ETH) to the new network.
Note that at the moment a limited number of validators can participate in the network. Also, the coin transfer option is not available to users, there are no smart contracts and functionality associated with the Ethereum virtual machine.
Earlier Buterin announced the Ethereum 2.0 or Serenity. This upgrade involves a transition to the Proof-Of-Stake (Casper) algorithm, the implementation of sharding (multiple parallel chains connected to the main one, for executing various smart contracts and ensuring decentralized applications), updating the virtual machine (EWASM), changing the cross-contract logic and economics of the protocol.