In PowerShell v3, to work with WMI you can still use the old WMI cmdlets like Get-WmiObject. There is a new set of CIM cmdlets, though, that pretty much does the same – but better.
For example, CIM cmdlets return true DateTime objects. WMI cmdlets returned the raw WMI DateTime format. Compare the different results:
PS> Get-CimInstance -ClassName Win32_OperatingSystem | Select-Object -ExpandProperty LastBoot* Thursday, January 31, 2013 03:40:26 PM
PS> Get-WmiObject -ClassName Win32_OperatingSystem | Select-Object -ExpandProperty LastBoot* 20130131034026.622639+060
