I guess that's really a sign that games like this are going away... which is somewhat fine, I guess. One thing that's been proven is that increased technology hasn't really imporved these games all that much. SM4 and Civ4 more or less proved that. I'd rather be playing the old "ugly" ones than these when I get the mood. It's still sad to see them go or, hopefully, away for a while.
Of course, the real reality is the Maxis and Wright are probably just busy plugging away at Spore while EA wanted something with name recognigtion that'll pull in a few bucks easily. These other guys probably have a lower price tag and developement cost associated with them, so it's sorta win-win for EA.