Android N apparently includes a nifty feature that will allow you to take your multitasking to the next level. Some devices like Samsung devices have split screen built in, but no one has really been able to lock down real multitasking via a windows style User Interface.
Hidden within Android N is the Window mode. You can resize and drag and drop apps just like on a desktop. Once enabled the recents app displays an icon in the upper right hand corner which will give you the ability to pull an exact app into window view mode. Head to the link below for more details.
via Arstechnica