This feature has already been requested before, among other improvements to the scene capture functionality, but I think this single feature would be really easy to implement, and it could be really useful for some people.
You can quickly check why it would be useful if you have some kind of VR headset. For instance, if you have a Gear VR:
- Create a new project using the 2D Side Scroller template.
- In the project settings, configure the Android platform to target the Gear VR. (Minimum SDK Version = Target SDK Version = 19. Configure the AndroidManifest for deployment to GearVR = true.)
- Package the project for Android (ETC2).
- Install the project on your phone; run it; connect your phone to the Gear VR; put on the Gear VR.
- Look around.
The only way to make Paper 2D really useful in the VR era would be by allowing to capture the scene into a texture using an orthographic projection. Then you could draw that texture on a virtual cinema screen.
It seems likely that Google Daydream will let any game be playable both on the device’s screen and on the VR headset. I’m sure most gamers would prefer playing a 2D game on a virtual cinema screen rather than on a phone or tablet screen.