The other incomparable feature is wifi casting vs bluetooth streaming. You can pick a playlist/album from your phone, hit cast, and ship your phone off to Alpha Centauri without the music disconnecting. Much less battery drain than Bluetooth, and higher quality audio regardless of if you're taking advantage of the optical output to a high-end DAC.

My only gripe is that sometimes you can keep your phone in your pocket and use the volume buttons to adjust the casted volume, and sometimes it doesn't work. Might be an iOS thing though.