What will happen to my Ethereum in my wallet when Ethereum hard forks?

The Ethereum has undergone a planned hard fork at block number 4.37mil (4,370,000), which occurred on Monday, October 16, 2017. 

The Metropolis hard fork was a planned and highly awaited hard fork which contained some major upgrades for the Ethereum network. Since this hard fork was planned, and non-contentious, there should be no chain split and there is nothing you need to do to prepare as it will go by largely unnoticed by many who are not in-tune with the technical back-end of Ethereum.

The purpose of Metropolis is to address scalability, privacy and safety. This hard fork will take place in two separate phases, Byzantium and Constantinople and will prepare the way for the future planned hard fork called "Serenity" which will allow for POW and POS.
The "Byzantium" portion of the fork includes:   
• zk-SNARKs or in plain English Zero-Knowledge proofs, increasing anonymity of transactions.
• Easier programming of smart-contracts with a gas adjustment for bill setting.
• Better security through 'masking' allowing users to determine addresses which they hold the private key.
• A mining adjustment called a 'difficulty-bomb' making mining exponentially more difficult.
So what should you do to prepare for the upcoming hard-forks? In short, nothing; Exodus will take care of everything for users. However, like with any fork users should be cautious for 24 hours around the fork and not move ETH or ERC20 assets. The Ethereum and ERC20 tokens in your Exodus wallet are safe and will continue to function as they have in the past.