It looks like EIP-186 is going to become a reality.
https://github.com/ethereum/pm/issues/17EIP 186 Comments from chat channel
Vitalik: "I want to re-bring up EIP 186; I think we are more than secure enough with ETH at these levels (or even at $50) and wasting more electricity than some countries is tragic so we could use a decrease"
Avsa: "The plan for Casper is to start with a slow transition from PoW, right? Is the idea to have a slowly decreasing reward? Maybe if we set a slowly decreasing schedule now - which then has a slight uptick when PoS comes around, it might be an actual incentive for miners to move to the PoS chain when that is ready"
"I am also tentatively in favor of it with we can justify it in terms of incentiziation. I am against it if it’s heavily dependent on ether price or if it’s about pure economic planning
Maybe what is needed for this conversation to move forward is a clear proposal with numbers backing it up: reduce to X on Y date then changes to N when PoS comes etc. We also need to account for black swans: what if the new ice age comes, Casper isn't ready and ether is under $20?"
Nick: "My own opinion on this has evolved; I'm tentatively in favor of at least a modest reduction.
Exactly because it's a step towards the reduced issuance Casper is likely to have."