802.11ac is a development of the current 802.11n standard, producing improved performance on the same 5GHz frequency bands. Some routers using the 802.11ac have already been deployed, and the experts on the panel agreed that it will become commonplace by early 2013.

via Interop: Don’t sweat 802.11ac Wi-Fi – because 802.11ad will knock your socks off.

Devices using the 60GHz standard could begin to appear in 2014 and become more prominent in 2015. This means that the next major transition is still well over a year away – in part because 802.11ac will not be a particularly testing upgrade for most end users.