The Weibo user explained that the iPad Pro's new matte display option will be offered in addition to the standard, glossy glass finish. It apparently features -4° to +29° of haze and may tout some kind of blue-light blocking technology to help protect the eyes. Matte screen protectors for the iPad have become popular, so it is possible that Apple is trying to offer such an option at the point of purchase for those who want it.
I wonder what this means for display performance in direct Florida sunshine, as the current iPad lineup is worthless outdoors here.