Sirius XM's first Onyx radio showed its face three years ago. For the technology world, that might as well have been eons; that makes it something of a relief to see an update, the Onyx EZ, going through the FCC for approval. The differences that justify the 1950's-era model suffix are tougher to identify, however. Both the current and future Onyx models revolve around superficially identical feature sets that include a PowerConnect FM transmitter to streamline in-car setup, station preset controls and quick access to both traffic and weather. If there's more lurking underneath the EZ, we'll have to wait for an official launch, whether it's at a Las Vegas trade show or later into the year.