Skype Room Systems v2 4.0.64.0 update was released to the Store on December 14th.
SRSv2 updates are released to 10% of devices with availability gradually increasing to 100% after a few days.
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Updated Dec 20, 2018
Version 3.0
Blog Post
Hello, IanBryant. Would you be able to post a photo of the wireless support that you describe above? I ask because Miracast support was *not* part of the 4.0.64.0 update release. However, as Jeff Schertz points out above, we will be supporting a feature called "Bring Your Own Meeting" which enables Teams mobile clients to listen for a Bluetooth beaconing signal from the SRS device. Prior to the end of the year, this functionality had not yet been rolled out for general mobile client release, but it might be available to early adopter (TAP) customers if you are part of the TAP ring.
I'm attaching a photo of the BYOM experience as seen on my laptop here internally at the Microsoft office. As you can see, before joining a meeting, I'm notified that there is an SRS device nearby to use for the meeting that I'm about to join.
Hope this helps.