Youve inspired me to do some looking around and I found out that they will eventually be releasing hi-res color photos. These are more of a geological thumbnail camera, make sure everything is working fine and the landscape around the rover is what they were hoping for. This was also taken through a heavy dust lens, they want to make sure its not a very dusty / windy day when the better cameras come online.
I guess it takes a very long time to get data off planet, these are small enough that they can get them off in minutes, were Ive heard on the web full color photos can take hours to days to fully upload off planet.