Part of the reason the Wii U was "badly marketed" is because it tried to be all things for all people.
If you're going to make a casual system, then make a casual system.
If you're going to make a core centric system then make that. Don't do the shit where you're trying to be both, that's where you get yourself killed.
There is no room in the middle of road, unless you want to get run over, pick a side to walk on. Nintendo finally did that with the Switch.
Yes the extended trailer has 1,2 Switch in it, but the actual commercial shown on the Superbowl has *zero* 1,2 Switch in it. And there's a good reason for that.
No grandpas or kids either. Just a college aged kid playing Zelda only. That's their Superbowl commercial, and that was a *smart* move.
Other experiemental stuff can have it's place, but it's place is in the back seat, not in the driver's seat, successful companies know what works for them.
If you try to make a product for everyone there's a good chance you're actually going to end up with something that makes no one happy. You need to have focus and *priority* in what you're making. There's nothing wrong with making the most rabid buyers of $50-$60 software in the modern market a priority. They should be.
And kids at least will come along fine, kids want what older kids want, they don't want what "mommy approves" for them, Nintendo has never understood this, maybe now they are getting it. Sony markets almost 0 to kids. But yet they've sold more home consoles to kids than Nintendo has over the last 20 years. Ever wonder why that is?
I'd argue the Switch is a middle ground. I've explained this already, but Breath of the Wild is a great game to ease casual gamers into more hardcore titles. When you get right down to it, it's essentially a simplified console game. One that has as much depth and challenge as those on the PS4 and Xbox One, but with the Simplicity and Short-bust gameplay of a mobile title. No matter what you're doing in the game, there's always something rewarding to do even if you only have 30 minutes to spare. Just because the commercial had some dude in his 20s playing it means nothing, it just means it was very well marketed. Besides, you do realize casual gamers can be males in their 20s or 30s do you?
What I'm trying to say here is that, a successful console does not succeed on core gamers alone. Hell, even Sony knows this, which is why they hyped up the PS4's social and media features at launch as well. If Nintendo wants the Switch to succeed, it shouldn't limit itself to one demographic, it needs a diverse range of people playing it.