On 2013-09-24 there were 2449 smartphones listed by the Wi-Fi Alliance as Wi-Fi Certified
72 were listed as 5G Wi-Fi enabled i.e. 802.11ac
63 were listed as Passpoint Certified i.e. 802.11u
5G Wi-Fi is important primarily because its speed and range improvements in the less congested 5 GHz frequencies lead to a better experience. More 5G Wi-Fi networks need to be deployed.
Passpoint (Hotspot 2.0) is important because it enables ‘Wi-Fi roaming’. This automates login to diverse Wi-Fi networks. The effect is generally a faster connection than a mobile carrier can provide because of the rapid growth in mobile data usage. As a result it is sometimes called ‘mobile carrier offloading’ or ‘Wi-Fi offloading’.
The Wireless Broadband Alliance are promoting Wi-Fi roaming in their Next Generation Hotspot (NGH) project.