Until the unnamed 6.1 patch, the gold standard for patches that players totally forgot even happened was Burning Crusade's 2.2. 2.1 had brought the Black Temple, the Battle for Mount Hyjal, and the Netherwing daily quests, while 2.3 would later bring Zul'Aman, the Engineering Flying Machine and Turbo-Charged Flying Machine mounts as well as the first awesome epic goggle armor, and the town of Mudsprocket in Dustwallow Marsh, complete with several new quests in the zone.
2.2 brought Voice Chat. Yep, WoW's had an in-game Voice chat since Burning Crusade. Have you used it? I actually did, I think twice.
Players have instead typically opted to use other programs like TeamSpeak, Ventrillo, Mumble, or whatever the kids are using these days.
Well, guess what?
Blizzard is at it again.
This time, Blizz is trying to create a pan-Battle.net voice chat system. They'll start testing it with the Overwatch beta, which starts next Tuesday.
Good luck Blizzard!