Take a hypothetical situation.
Middle Class Family (maybe Upper Middle Class) has two kids, mom, dad.
Both Kids had GBA SPs. Brother got the orginal DS. Sister got the DS Lite when it came out. Brother moved up to the DS Lite eventually. Mom got the DS Lite for the Cookbook and Brain Training games. Both Kids and perhaps even the mother will upgrade to the DSi when it comes out.
The same situation could and probably would happen with the Wii. Slightly less because it is a console and not a handheld but I could see the same family eventually owning 3 Wiis (1 for each kid and 1 for mom) not to mention if Nintendo can somehow get into the father's head.
And when colors come out that is going to be killer. I myself plan to purchase a blue Wii when and if it comes out as long as they don't come out with a special edition Legend of Zelda Wii when the next Zelda launches (got the LOZ DS with Phantom Hourglass)
Currently dreaming of: DKC4 or Sonic the Hedgehog 4 (classic 2D platformers) for WiiWare, Smash Bros. for DSi, New Super Mario World for DSi, a Wii remake or true sequel of Final Fantasy Tactics.
One down, hopefully more awesomeness to come.
