Yes. it says "Wi-Fi for high-data rate connectivity and Thread for low-data-rate communications"

Wi-Fi in the hub but not in the devices would make no sense. Why have Wi-Fi in the hub if devices aren't going to use Wi-Fi to connect to it?

Also I went back, and searched the post for Wi-Fi, and the thing I quoted is the only reference to Wi-Fi. It uses Wi-Fi for high data rate connectivity. IE, a camera transferring data to the hub. so the camera has wifi. You can't transmit data over Thread, it's not high bandwidth enough. No where in the linked post, though, or in the source press release does it mention that Wi-Fi is optional, but other more informed users here have said that it is optional, and only necessary for high bandwidth stuff like cameras, so lightswitches could be Thread only. So some devices apparently won't have it. But many will.

Reading the actual CSA press release, it says

> Wi-Fi enables Matter devices to interact over a high-bandwidth local network and allows smart home devices to communicate with the cloud.

So yes. The goal for the Wi-Fi is both to transmit high bandwidth stuff like camera feeds over local network, but also to allow "smart devices to communicate with the cloud" aka "reach the internet". So yes, the devices _will_ have WiFi.

You should read it more carefully.