In actual fact the story was about Apple including a trusted computing driver in their latest developer kernel. Of course the story nicely skips the fact that Linux also has such a driver.
 Digital Rights Managements, not Direct Rendering Manager.
Update: The recent developer builds leaked onto the torrent sites include only Rosetta as a key bit of technology which requires TPM. Examining the Rosetta dæmon (from publically available sources - not the code itself) I have to say my gut instinct is that this isn't to restrict running it, merely to make use of the accelerated SHA-1 implementation on the TPM chip. Further I would guess that this is to make a very fast hash-table implementation, the sort of thing required for a performance critical thing like binary emulation.