We are only two months into 2018 but it is just the tip of the iceberg when it comes to Chrome OS. This year is slated to be a busy one with 8 releases of the platform scheduled to happen this calendar year. One of those, Chrome 64, has already happened but by the time we get to December, we will be rolling out Chrome 71 believe it or not.
The Chromium team has put together a tentative schedule of releases for Chrome OS for 2018. While the calendar is subject to change due to unforeseen bugs or other issues, last year the team was pretty much on target all year with releases. It is a reasonable bet that 2018 will follow suite.