The RDX uses Gracenotes (which you can update) to display album art for any CDs or MP3 music you may be playing, unfortunately it doesn't use the software for the radio (satellite or FM). If you recall the Tacoma also used Gracenotes for everything including the radio, sometimes it would display the wrong artwork.
Looks like the RL update is now expanding the artwork to the radio as well.
Looks like the RL update is now expanding the artwork to the radio as well.