Along with its major EOS 5D Mark IV announcement, Canon rolled out 2016 updates for two of its staple pro lenses and a Wi-Fi upgrade for a trio of cameras (that should have had it to begin with).
Canon's solution for retrofitting the EOS 7D Mark II and EOS 5DS and 5D SR with Wi-Fi takes the form of an SD-slot compatible adapter, the W-E1. The adapter just looks like an SD card: there's no on-board storage. While it will ship bundled with those camera models going forward, current owners will be able to buy one for $50 (directly converted, £38 and AU$66). You will have to upgrade the firmware of your camera to support it, and sadly, it's 802.11 b/g/n rather than ac.
According to Canon, the third version of its 16-35mm f2.8, the EF 16-35mm f2.8L III USM lens has better edge-to-edge sharpness than its predecessor, as well as improved dust and weather resistance. It's slated to ship in the US by the end of October for $2,200 (directly converted, £1,662 and AU$2,890).
As for the EF 24-105 f4L IS II USM, which will also be available as part of a kit for the 5DM4, it gains enhanced image stabilization -- up to 4 stops from 3 -- plus an update to Canon's Air Sphere coating (ASC) to decrease flare and ghosting. It should also be available in the US by the end of October for $1,100 (directly converted, £830 and AU$1,444).
The company also decided to add a new kit for the 7D Mark II with the EF-S 18-135mm f3.5-5.6 IS USM lens for $2,450 (directly converted, £1850 and AU$3,220) starting in October. Try not to confuse it with the current $1,950 (£1,670 and AU$2,590) 18-135mm f3.5-5.6 IS STM lens kit.