I really like where Microsoft is going with project Honolulu (now Windows Admin Center).
First and foremost the fact that it will be part of your Windows Server License, so not additional cost! :)
The tool is also backward compatible and can be used to manage servers up to Windows Server 2008 R2. Admin Center can be installed on Windows 10, Windows Server 2016, Windows Server versions (1709, 1803) and Windows Server 2019. No prerequisites needed. IIS, Agents or SQL are not required to make this work. Only exception to this is that WMF 5.1 need to be installed on Windows Server 2012, 2012 R2, 2008 R2 because you need the latest version of PowerShell.
But my favorite feature is the ability to add extensions to all this and add more capabilities. The fact that we can develop our own extensions is also a great feature.