I normally do not publish the “link to” posts, preferring to share on LinkedIn, but Devin Akin well deserves it. Matches my perspective 98%+, especially the point on 802.11ac stillborn MU-MIMO.
Preamble: Aerohive has released the first 802.11ax APs (the official 802.11ax standard spec is not final yet) – so expect the marketing race.
TL DR: The only good thing is OFDMA sub-carrier allocation (think sub-channels) similar to what exists in GSM/LTE/WiMAX, but it would not work w/o client support and forget 2.4GHz.
Anyway, enjoy the article: http://divdyn.com/802-11ax-not/ and let me know your thoughts!