Catalyst or Killer App? I think the killer app for TPM implementation across the PC domain is FDE.
FDE is simple, its contained, it's transparent, I understand how to implement it, it comes with all the tools necessary to make it work, its cost effective and it's not built on a proprietary standard. If I work in a bureaucracy, I like it because it has NIST certification which gives me cover in case something goes wrong after I install it.