Via
https://blogs.technet.microsoft.com/windowsitpro/2018/02/01/changes-to-office-and-windows-servicing-and-support/
1. LTSC 2018（很可能是1809版本）
Office 2019 apps will be supported on:
Any supported Windows 10 SAC release Windows 10 Enterprise LTSC 2018
The next LTSC release of Windows Server
The next LTSC release, Windows 10 Enterprise LTSC 2018, will be available in the fall of 2018. In keeping with the previous Long-Term Servicing Channel releases, this release will have the same features as the Windows 10 Semi-Annual Channel release made available at the same time – with the usual exceptions (including apps that are often updated with additional functionality, including the in-box apps, Microsoft Edge, and Cortana).
2.Office 2019没有MSI版本
The Office 2019 client apps will be released with Click-to-Run installation technology only. We will not provide MSI as a deployment methodology for Office 2019 clients. We will continue to provide MSI for Office Server products.
3. Windows Server Semi-annual Channel很可能会有桌面版，取代Windows Server 2016（和对应的Windows 10 LTSB 2016）
We recognize that some of our customers deliver Office to their users via Remote Desktop and VDI. Later this year, Microsoft will deliver new Remote Desktop and desktop virtualization capabilities within the SAC release cadence of Windows 10 Enterprise and Windows Server. Join the Windows Server Insider program to get early access to these capabilities.
