As of June 21, 2018, Microsoft Teams for Surface Hub is now in preview for Windows Insiders. https://www.windowscentral.com/microsoft-teams-surface-hub-enters-preview-insiders
We have raised the priority of this work item, and it is currently being worked on. We don’t have any dates to share at this point, but will update when we have new status. Thank you!
The team has delivered improvements to the New Meeting experience in Calendar such as optional attendees, richer custom recurrence UX, as well as enhanced meeting RSVPs.
To learn more about RSVPing to meetings in the Teams Calendar, how to create a recurring meeting, and the new meeting scheduling experience including the scheduling assistant, please visit https://support.microsoft.com/office/schedule-a-meeting-in-teams-943507a9-8583-4c58-b5d2-8ec8265e04e5.
Group Calendar is a priority for the team, and the feature team is continuing work on it. You’ll start to see some incremental improvements. We look forward to sharing more details and timeframes soon.