Basically,
"Google Takeout allows you to download a copy of your data stored within Google products." and you can access things from
here
And you can find more detailed information
here.
This move is pretty great because it targets Facebook and other social networks directly and it's not a side project but one of the key components that will power Google products, in short, you can keep a copy of your information.
It's like Totse.info giving you a download button where you can download all your posts and threads and keep them on your HDD and use them later on. Fascinating concept. Oh and it supports Google Voice now.