I'm sure El Reggians know, but I need this off my chest.
Nothing is being "ditched." The Wi-Fi Alliance is just using another naming scheme for their certification program. 802.11whatever is still around, and will continue to be as new docs are ratified by the IEEE. People referring to the specific technology will still use the standard names.
To be honest, most consumers just saw something like AC500 anyway, so I'm not sure it was really needed.