Maybe you'd enjoy reading this thread.
http://gamrconnect.vgchartz.com/thread.php?id=77267&page=1
The problem with judging the HD consoles based on traditional core gamer adoption rates, is that 360 and ps3 are LITTERED with traditionally core games of a wide variety of different genres. Third person shooters, platformers, first person shooters, stealth games, arcade-type games, side scrollers (Raiden, etc), story games, RPGs have very different audiences. While there will always be some overlap, these games tend to display a cumulative core base. That is, each genre/franchise makes up a piece of the pie accounting for some overlap.
So, as opposed to using Brawl as a metric, using Halo as a metric is really only looking at a slice of what would be called the "traditional core".
