Takes 10 years to finally find the proper answer \:\)
Basically the array WMI returns has the following property "ItemIndex" (Also "Count" as pointed out earlier in this thread).
So in effect it would be $colItems.ItemIndex(0).Property
Example:
 Code:
$strComputer = "."
? "ComputerName= "+GetObject("winmgmts:\\"+$strComputer+"\root\cimv2").ExecQuery("Select * from Win32_ComputerSystem").ItemIndex(0).Name