The issue of Trusted Computing across different platforms is one of interoperability and, hence, one of reaching the most customers...
In the long run only systems leveraging an open programmable platform will remain in the market place. So, Motorola's Mobile Extreme Convergence (MXC) architecture may just be kind of a mirror image of ARM's "TrustZone" security extension architecture...
"...Secures airborne transactions and provides on-board security by incorporating Motorola’s security technology to help protect consumers and enable widespread access to anywhere, anytime downloads like video files and mobile commerce transactions..."
Much less details are known about Motorola's MXC architecture but there is, in my opinion, no doubt that Motorola's system will interface to an interoperable Trust Network...
If it doesn't...well, then TI and STMicro and all the other mobile system (chip) builders will walk away with the cake...and Apple will concede its market they have so nicely been building...
Oh...and how about this(!):
From a Motorola/Freescale whitepaper on the Mobile Extreme Convergence (MXC) architecture:
"...Dedicated application processor — An ARM1136 core, operating at 400 MHz with 128 Kbyte of on-chip L2 cache and a full complement of peripherals, provides a dedicated application processor environment that surpasses the performance of discrete application processors on the market today..."
"...System security — The Mobile Extreme Convergence architecture includes Motorola’s security framework, comprising both hardware and software elements required for a wide range of security services and applications..."