I feel like this is a big miss for them. Am I really supposed to believe that the company making its flagship phones burn at 14W to simulate the travel of light through glass for a UI actually cares about the planet?
I strongly suspect (as I’ve said elsewhere) that there’s no simulation going on, just a bunch of precomputed refraction maps. Two dependent texture fetches are not nothing (and neither of course is the sequentializing nature of rendering a transparent thing over another thing), but I wouldn’t lose sleep over them if there was a point. Thus far I’m not convinced that there is.
Has noöne located and disassembled the thing yet? The speculation is getting tiresome. (I don’t own an up-to-date macOS device and have never owned an iOS one, so no help from my end, sorry.)