Forum Discussion
Coming Soon - All new Skype for Business client look and feel
Check the all new Skype for Business client look and feel https://blogs.technet.microsoft.com/nexthop/2016/10/27/new-skype-for-business-2016-look-and-feel-coming-your-way/
It hasn't hit my basic client yet.
Basic is MSI not C2R, so it'll probably get updated if and when MSI does I would guess.