The "yet to be publically announced" video portion of sirius/xm will not be supported on the old units. But the music will continue to be supported.
Fusion Brain Version 6 Released!
1.9in x 2.9in -- 47mm x 73mm
30 Digital Outputs -- Directly drive a relay
15 Analogue Inputs -- Read sensors like temperature, light, distance, acceleration, and more
Buy now in the MP3Car.com Store
I for see in the future they will pick one format and phase out the other. It makes sense to continue to make units with two different standards, the one with the most features and growth will win out.