once your at 3 mega pixel you have sufficient res to do decent pictures, you could argue at 2mega pixel you at higher res than your monitor will go its all aobut the lense and A to D microsensors. that sony one has a karl zeiss lense which is what a lot of expensive proper digicams have although due to its cost and size its not as advanced... yet.
but they are getting miles better. remember those old super low res blocky images you used to get just a year and a half ago now look at the quality difference !!
btw nice car, love the wheels, have you got the cup kit ?