Working with adults with physical and cognitive disabilities I often have to set up the device and start content playing on their behalf. This can be a tricky to manage in terms of positioning and isn't always great where there are infection control issues.
I can cast to a TV or tablet device to see what they are seeing but what would make the devices perfect for what we need is simply being able to control the device externally i.e. search for a you tube video and play it for the person wearing the headset.

This would open up the world of VR for so many people. I'd be happy to talk to you more if it would help.