If you noticed with GC, not many good games came out after launch. They released some good stuff for launch and then had nothing for a long while. Wii had one or two great launch games and the rest are more evenly spread out. Wii has their games being sold over a better time range. This should help keep the sales going. Instead of beating 6 good games and waiting a year for the next one, you beat a good one every 2-3 months and have enough games to keep you content throughout the year.