As stated in the Network World webinar "PoE Plus: Impact on the PoE Market", WLAN is one of the major drivers for the creation of IEEE802.3at, which at this point allows the delivery of up to 25.5W to powered devices.
If this seems to be enough for most IEEE802.11n access points (the enterprise grade ones take around 18W), 25.5W may be too little for VHT.
It would be interesting tosee how this new study group would affect the work of IEEE802.3at. Will the PoE Plus task force include an extension ofup to 51W to the standard, or will this be a future option, which can further hinder the adoption of IEEE802.11 VHT?