Now twist what I just wrote in your head a different way...
Take this for example:
http://www.sparkfun.com/datasheets/R...8_H_Bridge.pdf
If this were put on a power module to be attached to an interface module that would be a big chunk of the power module all in one integrated part. Okay it's missing some of the features of the Jaguar and it's internally a different animal...but still you could make that module with discrete parts.
The idea is to turn the power module into the mass production component. For now that module could be discrete parts on a PCB. Later it could be a single part on a simple PCB if you could afford the integration.
The Stellaris is leveraged in IP. It's full of features that make integrating harder and the more you do, the more the costs to ever reach that scale will sky rocket.
This is no different than the power amplifier (PA) modules used in cellular phones or the RF modules using the D-Link AP. Heck it's no different than the parts from MiniCircuits in the old electronics magazines.
The guys that make cellular phones know what crazy features they want. They buy the 'magic' RF parts from companies and figure the rest out themselves.