I think the real question is...does Nintendo really care? New Super Mario Wii sold wonderfully. Wii Fit keeps on selling.
They will be coming out with Other M and SMG2 later this year and the new Zelda game announced for later this year (I personally believe next year).
Nintendo knows their market and that's what they are targeting.
We the gamer feel dissapointed, however, until Nintendo decides to change their strategy, we have PS3 and 360 for a consitent stream of core games.