Offload is a toolkit: a set of APIs and libraries for developers to add multi-screen functionality to their apps. It enables seamless communication between apps running on smartphones, tablets and PCs using wi-fi or bluetooth connections depending on the capabilities of the devices.
You will be able to push data from device to device - text to read, images to edit or data to visualise - and enable controls on one device to have an effect on the other.
And unlike second-screen apps which stream images from the PC to the mobile device, Offload apps are native. This means no lag, smooth scrolling and interfaces designed for mobile from the ground up.