AX 2012 R2 - New Feature Documentation ? Eg. NEW Project Purchase Order Parameters

Is there any detailed (useful) R2 new feature documentation available?

Take for example the new Project Purchase Orders section in Project management & accounting parameters > General

I can find nothing on this in :

a. Help menu

b. Technet / MSDN

c. Partnersource documentation

d. InformationSource

I have switched the Item Consumption parameter on (without Create Item Requirement) and nothing seems to happen.

I expect the system to post the costs to the project upon posting of the Product Receipt, as aluded to in the official Microsoft Dynamics AX 2012 R2 New Feature List document on page 5:

Can anyone help with this?

Many thanks