(As far as I know, Wi-Fi is an alternative to Ethernet, not wireless Ethernet.) I've looked at a few articles and it does look like they're actually using Wi-F

(As far as I know, Wi-Fi is an alternative to Ethernet, not wireless Ethernet.) I've looked at a few articles and it does look like they're actually using Wi-Fi. (This will no doubt confuse some non-techie people, who use "Wi-Fi" to mean "an Internet connection".)