Real late to the vPro party.
Is there any way to query which machines are vPro capable?
vPro machines will have an inventory category called "AMT Information".
I would suggest creating a query similar to:
AMT Information.AMT GUID exists
Create a new query and add the component Computer > AMT Information > AMT SCS Information > AMT Version EXISTS and click add.
In the Column set, add in thatsame feild so that the results are displayed.and click on save, that should give you what you need
Retrieving data ...