My son is almost 17, and I could have made the same list of games I'm nostalgic for. I could be wrong here - I'm not a huge gamer, but I just don't see those types of games available for the Xbox. PS3 and Wii strike me as the platform for whimsical games, and Xbox as the platform for rote FPS's.
I've never been a console gamer so I wasn't really aware of this distinction - though I guess I do have some vague sense of it. I'd just assumed that the big titles were all available on all platforms. However, it appears you're absolutely correct , the games I listed weren't available on Xbox.
Still, speaking to unalone's broader point, maybe he just shouldn't have purchased an Xbox and stuck with one of the other consoles. Those games do exist.
I think the other reason why that change occurred is that the first generation of gamers grew up, had disposable income and were a huge potential market. Xbox was marketed specifically at that group and has been highly successful, but it was expanding the gamer market - it didn't do that by destroying the other genres. This isn't a zero-sum situation.