OS X Yosemite will let you answer calls to your iPhone from your Mac
 

As part of OS X Yosemite's focus on creating a more seamless experience between your Mac and iOS devices, Apple's updating iMessage to keep conversations going. Now it's not just instant messages from other Apple devices that show up on the desktop...

http://www.engadget.com/2014/06/02/i...=rss_truncated