Date: December 9th, 2018 7:08 PM
Author: slippery mexican
Jan 2019: Constantinople: Minor tech fixes.
Future contracts (ones created after Constantinople) can be made slightly cheaper due to bitwise shifting opcodes and the EXTCODEHASH opcode (eip-145 and eip-1052)
Generalized state channels will be more affordable and easier to use due to CREATE2 (eip-1014)
Existing contracts (and future contracts) executions will be cheaper due to the addition of net gas metering. (EIP-1283)
The difficulty bomb is being delayed another year, so you don't have to worry about long blocktimes. Issuance is also going down from 3 ETH base reward per block to 2 ETH base reward (both in eip-1234)
Q4 2019: Initial roleout of staking. (Beacon Chain Staking as phase 0 of Casper CBC/Serenity/Ethereum 2.0.)
2020: Sharding Casper CBC/Serentity/Ethereum 2.0 rollout.
https://www.reddit.com/r/ethereum/comments/a4d4aw/can_someone_eli5_whats_changing_in_the/
(http://www.autoadmit.com/thread.php?thread_id=4152737&forum_id=7#37379016)