Nice upcoming Rails 4 and Rails 3.2 difference explanation

Source: http://speakerdeck.com/spastorino/rails-4-in-30

Nice Presentation and understanding on Rails 4

ArrrrCamp #6 - Steve Klabnik - Why should I care about Rails 4? from Openminds on Vimeo.

Rails 4 and the Future of Web

Source: http://confreaks.com/videos/1228-aloharuby2012-keynote-rails-4-and-the-future-of-web