We've stack which is more or less like Flexbox. However having a CSS Grid capability will be great. Not to be confused with another feature that says "Grids layout" I think that's too preview a design with grid lines?
I believe this CSS grid feature can play hand in hand with responsive design capabilities
  • Make this easier for users to set breakpoints.
  • Make it easier for users to define regions on page.
  • Make constructing layout a lot easier.