My thoughts on using sub-expressions to access object properties.
$serviceObj = Get-Service "wmi*" Write-Output "Service Status $serviceObj.status" Service Status System.ServiceProcess.ServiceController.status
Not really the output I was expecting. This is where the sub-expression comes in handy! I can use a sub-expression to extract the status property value and display without using another variable.
$serviceObj = Get-Service "wmi*" Write-Output "Service Status $($serviceObj.status)" Service Status Stopped
DevOps Unleashed 