The 4.0 release of Ruby on Rails is right around the corner. I'm going to highlight some of the new features and changes in the newest version of Rails, as well as features that will be removed or deprecated in Rails core.
(Note: The content of this slide may not reflect the final version of the release.)
Presented at BostonRB on September 11, 2012. Video is available at http://bostonrb.org/presentations/what-to-expect-in-rails-40.