I would dare to suggest, however, that the two formats actually benefit each other. In fact, in theory, curved could actually save 3D from the scrap heap.
Example: Here's a Sodality: Adaptation image of Ciem landing safely after dodging a truck that was tossed at her, in "flat" 3D red-cyan anaglyph:
It looks... decent, in only this format. But... how much easier is it on the eyes if I were to use a curve TV-like filter distortion warp in Photoshop for the same image?
Even without the 3D glasses, it looks more pleasant to my eye. Now try immersing with the glasses on...
So what do you think? Should Curved UHD 4K be 3D's golden ticket to another chance? We all know that flat TVs are bad at 3D. But could curves fix a lot of 3D's problems?