I'm hosting a talk about Rails 4 going through all the new features as of the 4.1 release. It will be targeted towards people new to Rails and experienced Rails 3 developers.
This event has an amazing lineup and I'm looking forward to attending many of the sessions myself.
Co-Author here: I'm part of the team that is helping write The Rails 4 Way. Just to address your concerns, we have gone through the existing manuscript and removed everything that isn't best practice today. On top of that, we are covering all the new Rails 4 features, and important gems/techniques valuable to a Rails developer today. The second half of the book is going through a big revamp right now. Look for updates in the coming weeks.
This event has an amazing lineup and I'm looking forward to attending many of the sessions myself.