I don't think there is anything else that Microsoft needs for the TPM world...like Doma said, it would effectively enable the services side in the TPM world on a grand scale...via KTM and ACM server infrastructures...
Now, for the NGSCB component, there may be other stuff...we'll see...
dhamster - The real possibility of Microsoft licensing the CSP has been known for a while. As far as anything else MS might include of Wave's in Longhorn would be some of the basic tools currently offered in the ETS such as Document Manager, PIM, Smart Signature, etc. Sprague even mentioned this in a presentation by him and Peter Biddle a year or two ago. See Awk's website for that presentation.