Azure Stack - Integrated Hardware Video & links to TP2

Why does Azure Stack come as an integrated system and what do we mean by that?

https://sec.ch9.ms/ch9/8890/ab940b4e-56d8-42a7-9440-a1d03abf8890/AzureStackInsightsintoIntegratedSystems\_high.mp4

 

Also https://blogs.technet.microsoft.com/hybridcloudbp/2016/09/27/windows-server-2016-rtm-system-center-2016-rtm-and-azure-stack-tp2-now-available/