While it is a cool technical advance to see, its use case is probably niche. One of the biggest things people say about photography is lighting. In general, if you can get more photons onto your imaging plane, you will have a better picture. This is why phone cameras, despite advertising 100s of MPs, still fall short. For the same field of view and capture conditions, fewer photons are collected because phone sensor sizes are much smaller. This is a physical limitation that cannot be overcome.

Now given that they already have a lower photon budget, you now want to add aperture control, which when stopped down physically reduces the amount of light from the scene that reaches the sensor. Thus you need to compensate for these lost photons somehow, so gain will probably have to increase quite a bit, but then you get noisier, grainier photos. This then leads to the suspicion that you will need some sort of AI denoising or computational processing to recover some of that lost image quality. Though of course you can comp in other way such as exposure time (they can make big wins here with their stabilization) and tons of lighting.

Also a phone already starts with very deep depth of field because again smaller sensor size thus smaller focal length etc. Most images at their lower f stop is already in focus. So the ability to reduce aperture or simulate shallow DOF is trying to give users more of the creative control that larger sensor cameras naturally have (need to manipulate because of their larger sensor size) and doesn't make much sense to me.