Did you read this?
https://github.com/ethereum/eth2.0-specsLet me make it real simple for you:
Ethereum 2 Phase 0No smart contract support, all processes will pass in ETH 1.0
Validators will lock their ETH and will validate rewards to each other in ETH 2.0.
Ethereum 2 Phase 1No smart contract support, all processes will pass in ETH 1.0
Shards will be added, this will slightly increase the throughput in the ETH 2.0
Ethereum 2 Phase 2Sharding with smart contracts support
How long? Will this work with other smart contracts?
..
I already wrote about the phases of Ethereum 2.
Phase 0 and Phase 1 will not add significant changes to the speed of transactions. And the transition to phase 2 can take a very long time. I see that most users do not understand the nuances of ETH 2.0
We will still see a lot of speculation on the news.