For kids, perhaps. But not only "for kids" parents are chasing it everywhere, I think it's obvious - most 'Wii-chasers' are adults, buying it for themselves.
PS3 is
expensive, expensive as hell. I could've bought it, even aside of my Wii but I loath any console. Wii was the first console I really admired for bringing something new to the table, somehing else than the usual craptastic console-copy of PC gaming, with its newly invented control system.
this is why I got the wii for its innovative game play. I play it for hours at a time usally untill my arm/shoulder start bothering me. I just have wii sports no other games. I took it to a friends house who has the 360, he is an avid golfer and could get over how much fun it was to play golf on the wii compared to his tiger woods on the 360. Its not always about graphics, yes the wii might not compare graphics but is much more fun to play.
That's my point, exactly (though I have the very funny Rabids, ugly and boring Zelda and Red Steel with its utterly useless controls as well).