Well, if we're going to use annecdotal evidence to make conclusions for all parents and kids, then you are wrong. My son, 10, doesn't play Minecraft. At all. What he does play, though: Lots and lots of Pokemon and Mario Kart DS. Literally everyone in his class has a DS (a fact we learned at a recent birthday party). Even the Pokemon TCG is quite popular in his after school program.
While no one can deny that the Wii U was DOA and that Nintendo isn't the same as it was 10-20 years ago, there are signs things are starting to turn around once more. FY results were just announced and they posted a profit for the first time since 2011. Now that Wii U had a few decent games (MK 8, SSB U), console sales increased dramatically and only missed sales projections by a few hundred thousand units. 3DS sales are still strong but softening, likely caused by more focus on phone and tablet gaming. I also contend my son's class could also represent a trend: many of those who want one already have one. Also of note, they are developing a low-cost console for emerging markets (ie, China) and are still the global console market leader.
One area where Nintendo is NOT hurting, though (and most relevant in this discussion) is software sales. In the US, they had the top-selling title of 2014 (Pokemon OR/AS) and own 2015 so far (Zelda majora mask). There is nothing wrong with Nintendo's stable of characters or brand awareness, and provide ample fodder for engaging theme park attractions.