With iOS 8 and OS X Yosemite, Apple is focusing heavily on increased integration between desktop and mobile through several new "Continuity" features, including Handoff, which allows users to start a task on one device and swap to another nearby device.
While Handoff doesn't appear to work reliably at this point in time and is listed as one of the features currently unavailable in the beta software, some users have been able to get it working, giving us a quick glimpse at how the feature works.
A video from French site Mac4Ever displays how the feature works with Maps, Safari, and Mail. A map opened on the iPhone is automatically picked up by the Mac, displayed in the lower left corner of the screen, with the process repeated for a site in Safari and an email message in Mail.
Article Link: See Handoff on OS X Yosemite and iOS 8 in Action