Something was bugging me about your question, then it hit me. Actually it's a duel camera system.
Duel lense made me think of a single chip with rotary lense assembly in front of chip. My DSLR is a multi lense camera. This is like having two cameras mounted on a rod next to each other taking simultaneous pictures.
The cameras could be two different focal lengths. Or one could be black and white for low light, other color. Wonder if HDR would now be four pictures combined? This will be interesting camera development. I've read different articles, ranging from improved low light level, to much improved zoom capabilities.
For good 3D effects I would think further seperation of cameras would be beneficial. Perhaps one each corner, maybe in landscape mode. Hey, would force people to take pictures in landscape mode. Hehehe.
In astronomy great strides are being made using an array of smaller telescopes. Both in optical radio astronomy. Seems you can use programs to combine multiple images providing same or better results than a single larger lense or antenna.
iPhone 15 could have a dozen cameras on back, provide better pictures than DSLR. But how would you hold it?