This question has been settled with a final result: "No sharding in 2021". Trading has finished.
After the launch of the Eth2 beacon chain, the Ethereum project envisages to launch shard chains during 2021. Their purpose is to expand capacity both for transactions and on-chain data storage and retrieval.
As much of the acual plan is still up in the air, how much will they progress in 2021?
Sources:
1. https://ethereum.org/en/eth2/