C++11 rocks and I think Bjarne was right in saying that it feels like a new language. This isn't your grand-daddy's C++. It's certainly worth considering for your next project and valuable to learn if only to make you a better programmer.
See, the funny thing is, you're still going to be interfacing with your grand-daddy's C++, and his daddy's C. And you'll be adding cruft for your grandki--ah, who am I kidding, hopefully they'll be using Ruby.
EDIT: Downvote all you want--you know it's true. It is seldom you'll get to write a new C++ project from scratch, totally, using only standard libraries.
It's stuff like https://github.com/marshray/qak in which I indulge my impulse to recreate the universe from scratch in C++11 on the weekends so I don't act foolishly during the week.
I've been porting it to the limitations of MSVC 2012 and looking at implementing a lightweight Node.js-like IO system in C++11.