The best purchase this year will definitely be the PS2. No questions asked!
Hits like Jax and Dexter, FFX, MGS2, Silent Hill 2, Xenosaga, Wild arms 3, Legend of Lagaia, Soul Reaver 2, Jade Cocoon 2, GT3, Klonoa 2 will be the driving force of the system for this year and probably the year after that. World domination is guaranteed for a brief moment.
Down the line foretells a different story.
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GameCube will be a darkhorse and will only sell to a niche crowd. It will be very similar to the DC, but it will definitely last a lot longer considering the "kiddie" market is a stronger drive than a "Sega fan" market.
Like the DC, the GC will have the best games out of the three consoles.
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Xbox will be the runaway console leader down the line. With the support, ease of developement, and advertising dollars, Microsoft will be the industry leader without question. This will take place 2-3 years from now.
Outcome of this generation:
1. Xbox
2. PS2
3. GC
*Passing on the magic ball to the next recipient*