So with the new iPhone XS, the cameras on the back has received a number of
hardware updates, while most of the progress they're making is in software.

And it's no wonder, really. They're heavily restricted when it comes to the
hardware so any innovation needs to be on the software side.

Two years ago they presented the "Portrait mode" where they used both lenses
to create a 3D map of the scene and blur the background in post
automatically, faking a short focusing distance. generally it works really
well. This time around they even give the user control over this process, and
using a slider, you can change the aperture size in post, seeing the
background come into focus or blend away.

They've also increased their number of exposures when you take a picture, in
order to render a more detailed HDR photo

--
Sandman