I think it depends on what you are doing.  Audiobooks are great for traveling.  If you have to drive a lot there is nothing that compares.  I love reading books and I don't like all these new electronic devices like 
Kindle.  They isolate us from each other.  I love to travel around the world and spreading knowledge to others.  I always bring a couple of books with me and pick more up from other travelers.  The beautiful thing about tangible copies is that I can give someone a book that inspired me or changed my life to someone that maybe can't even afford books but when you have something like a kindle you can only recommend books and can never share or let someone borrow them unless they have a kindle themselves.  Audiobooks are the same in that matter.  I have loved audiobooks though for the last 2 years because I had to travel to and from work for an hour and a half every day so they saved my life.... 
Thank you,
Zach Nims