How are these related ?
This deal sets a precedent. Potentially indicating that D* and E* could get regulatory clearance to merge or be bought out based on the fact that terrestrial and cable television (plus IPTV) would be considered their competitors. Even though there would be no competition in relation to Satellite TV distribution.
and they compete with things like CD's, I-Pods, etc. for listeners in vehicles.
How is this different from DVDs, Portable media players, etc?