The future of PowerShell lies in PowerShell Core 6 and newer, with the focus to work platform-independently and together with the community on the new versions. We will see a transitioning phase in the upcoming years, where most of the existing modules are ported from Windows PowerShell to PowerShell Core.
In addition, we will see a lot of work being done within Azure Cloud Shell, providing more automation to work with Azure resources from anywhere. Windows PowerShell, though, will not gain additional features, but will keep being a built-in, supported component of Windows 10 and Windows Server 2016.