This excerpt taken from the SIRI 10-K filed Mar 10, 2009.
Rapid technological and industry changes could make our services obsolete.
The audio entertainment industry is characterized by rapid technological change, frequent new product innovations, changes in customer requirements and expectations, and evolving standards. If we are unable to keep pace with these changes, our business may be unsuccessful. Products using new technologies, or emerging industry standards, could make our technologies obsolete or less competitive in the marketplace.