I’m sure you can also stream to it over a conventional wifi connection as well, the point of the dongle is so that they can guarantee a direct connection with lower latency and on a dedicated radio frequency to avoid interference, which is especially for non-techies who don’t know what they’re doing and just expect stuff to work out-of-the-box. The headset is just running SteamOS and has a regular wifi antenna, so I see no reason why you couldn’t stream to it using plain old Steam Link or whatever if you already know your connection can handle it.
I’m sure you can also stream to it over a conventional wifi connection as well, the point of the dongle is so that they can guarantee a direct connection with lower latency and on a dedicated radio frequency to avoid interference, which is especially for non-techies who don’t know what they’re doing and just expect stuff to work out-of-the-box. The headset is just running SteamOS and has a regular wifi antenna, so I see no reason why you couldn’t stream to it using plain old Steam Link or whatever if you already know your connection can handle it.