There’s a post and a video [Google Translate].
It’s being demonstrated on the Pipo P1, a 9.7-inch Retina-class screen, Rockchip 3288 CPU, 2GBs of RAM.
It seems Rockchip has — ahem — borrowed elements of Samsung’s MultiView.
Here’s the video, which I cloned from Youku:
Mike Cane’s xBlog 
Looks nice, this is Android 5 probably!
Do you think so? Rockchip offered MultiWindow Android to its partners in the past. Chuwi and Vido had it. I wish Google would adopt this for Android 5.0!