Both of these changes will be helpful to those who use a lot of tables and charts in their documents. I wish that the vertical ruler feature had been available last week when I was trying to format a table to align to a sheet of name tag stickers I was trying to print.
Like most updates to Google Docs and other G Suite products, this update will be gradually rolling-out over the course of the next couple of weeks. If you don't see the new features today, you will see them before too long.