Not to incite the pellet-munching hordes, but it seems that both Xbox Live Arcade and Nintendo's Virtual Console regularly get the terms "old" and "classic" confused. We don't want all of the old games again, we want the best ones. True enough, not everyone agrees on what makes a quality arcade title, but taking greater care in choosing them in the first place would greatly enhance the lineups of both services. A true classic is something you'll pick up and play right this second, with nary a thought about graphics, sound or age -- and there aren't as many of those as you might think.
In those respects, perhaps Ms. Pac-Man is a classic. However, its familiar trappings don't demand an immediate 400 point ($5) purchase, especially not with Pac-Man already sitting on the same service and Worms being pushed away another 7 days. Games like this and New Rally-X only dilute the XBLA experience and a quick succession of them could steadily lead to more and more apathy.
Hell, it's not even that hard to defeat apathy. It just kind of lies there.