For the people that have not been following the news, it is now confirmed that Bitmain is selling an Ethereum mining ASIC. This can be potentially harmful for Ethereum's decentralization and thus the community is currently discussing on how this should be approached, potentially through a hard-fork change in the hashing algorithm used to achieve consensus.
There are valid arguments on both sides. I'll refer to bits and pieces I have extracted from my reading and understanding so far. This is where we should discuss with concrete arguments on each case.
My assumption is that full PoS, and not PoW/PoS Casper with epochs, is not close enough to be considered a remedy.