I have a different question: why hasn't Apple been using optical anti-reflective coatings on all their non-touch glossy displays -- especially the Thunderbolt d

I have a different question: why hasn't Apple been using optical anti-reflective coatings on all their non-touch glossy displays -- especially the Thunderbolt display? And: is this 5K iMac AR coated? AR coatings on touch screens are problematic because skin oils make visible marks, but on non-touch glossy screens they should be standard. Indeed, back in the CRT era, it was routine for high-end CRTs to be coated. I have noticed that Apple is using a coated screen for at least one model of MacBook Air, but for some reason they don't seem to have fully embraced coated screens.