What will staking ETH look like and how will users participate?

The next big step after Constantinople is the Casper upgrade, when ETH token holders will be able to stake coins. Instead of mining blocks, network participants will be rewarded for running a node and holding ETH for a fixed period.

[note: you get rewarded for holding Dacxi DAC coin too!]

Stakers will be chosen randomly from a large pool of token holders, earning rewards that are proportional to the number of ETH they hold.