An enterprising GeForce Forums user has stumbled upon a way of enabling split-screen multitasking on everybody’s favorite Android TV box, the Nvidia Shield TV. It’s not an entirely practical thing but if you have a keyboard you can connect it to the devices and run two apps side by side on your television at the same time.
With a keyboard which is connected to Nvidia Shield TV, press the rightmost Windows key or Command which is dependent on the model of keyboard and the left or right bracket that will move the open app to the left or right side of the screen.
The last app opened before the current on-screen app will automatically move to the other side. Like on regular Android, the screen is also divided into two portions by a line with a sort of handle in the middle of the screen that you can drag back and forth with a mouse and resize the two panes. You can also use Windows or Command key either bracket key to adjust the view on the screen.
XDA Developers wasn’t able to replicate the behavior on a Xiaomi Mi. It is also possible that this functionality is exclusive for the Shield TV. Split-screen isn’t implemented particularly elegantly, and the convoluted method of triggering it seems like it may not have been meant for users to find at all, but at least it’s fun to play around with it. If you want to test the limit of your attention span, knock yourself out.