The casual market does not bring in more money, especially over time(Atleast not on Video game consoles.) Not only does their software bring in less revenue per game sold(they're generally priced at $50 or $40 to start, compared to $60) but the core market is mostly split between the PS3 and 360. If you add up the software sold by the two "Core" consoles they far outweigh the Wii. Just because the most successful company caters to the casual audience, doesn't mean it's the biggest market nor the most important. It was just the most ignored and thus had the biggest opportunity to be captured by a single company. The biggest software sellers for casual games (Wii sports and now Kinect Adventures), don't even bring in any revenue. They are bundled for free. Compare that to the Call of Duty games which probably sells 75% of their stock at full price ($60 in America). So not only is there more core games sold, but for every 5 full priced core games, 6 casual games have to be sold to match the revenue. Don't know how the pricing works around the rest of the world but I could imagine it's somewhat similar. The "core" consoles also cost much more money to purchase than the "casual" machine, thus bringing in even more revenue.
Now that the competition for the "casual" market is heating up, the core market will become a goldmine for whoever caters to it the most in the coming years and coming generation. MS is being smart with their Kinect, especially short term, but i hope they don't forget about the core audience. Or else they will regret it when they all go back to the playstation brand.
