As ETH 2.0 is pretty much guaranteed to move from PoW to PoS some time in 2021/22, the question is what is going to happen to the original PoW chain?
It is clear that when the PoW chain is about to die, some people will remove the difficulty bomb and continue mining. The question is only how many people will do it.
It is a pretty unique situation, and it is hard to even call it a fork, since the original thing will be killed. It is something that never happened in the history of blockchain before.
Since the PoW chain is pretty much guaranteed to survive in some shape or form (it takes one miner to keep it alive), it makes sense to discuss how it will operate.
Here are some questions to discuss about the future of the PoW chain:
How should it be governed? Should it be some kind of a DAO?
Should it switch to ProgPoW or use the current PoW algorithm?
Should it keep all the current accounts or zeroize some of them (like the ETH1 premine)?
How should it pay for development?
What should the monetary policy be?