It’s essentially a matte coating, but the execution on iPad displays is excellent. While it doesn’t match the e-ink experience of devices like the Kindle or ReMarkable, it’s about 20-30% easier on the eyes. The texture feels also great (even though it’s less relevant for a laptop), and the glare reduction is a welcome feature.
I prefer working on the MacBook screen, but I nearly bought an Apple Studio Display XDR or an iPad as a secondary screen just for that nano-texture finish. It's super good news that this is coming to the MacBook Pro.