What if SiriusXM integrated with OnStar?

I was just wondering, if SiriusXM and OnStar combined their technologies into one device, you'd have a tremendous entertainment tool combined with interactivity, GPS, and voice. When the system was not being used for emergency purposes, it could relay local area alerts, including traffic updates. Too much for one device or an ultimate opportunity to sell OnStar and Sirius on non-equipped cars.