Red Bull has posted a great info page on the new rulebook for F1 in 2014.  It clearly explains the differences from last season.

And at the link below, click on the transparent car on the top of the Red Bull page to see an amazing video they produced with F1 drivers Daniel Ricciardo and Sebastien Vettel illustrating the changes.  Enjoy:

https://www.redbull.com/en/motorsports/f1/stories/1331638258301/new-f1-rules