That is a really great news, I’ve just read on PowerShell Team blog that PowerShell will be installed by default on top of Windows Server 2008 R2 and Windows 7.
It means that for us Exchange guys we will have one less step in order to install Exchange Server in the future Operating Systems 🙂
Read more at source: http://blogs.msdn.com/powershell/archive/2008/10/28/powershell-will-be-installed-by-default-on-windows-server-08-r2-ws08r2-and-windows-7-w7.aspx