Well you put so much emphasis on "fun" games in your original post, one had to assume that's what you were implying, even if you didn't actually say it.

But ok I get it now. You're NOT saying that Nintendo is the only company that focuses on fun games while other don't.
What you're saying is that other companies DO have fun games, but also focus on games with more depth in storytelling or gameplay which is what Nintendo lacks and that's...good? Wait... what's your argument again? I'm confused by your spin lol
And like I said before, this is mostly subjective.

""Nintendo focuses strictly on games""

That still doesn't change the fact that it doesn't make it any more of a true gaming console than the other two just because it lacks other features.

In both of these arguments you're ultimately stating the same thing.

""they have the gritty, and hardcore games""
So did Nintendo once upon a time.

Oh and yes, also the stigma from the Wii. Forgot to add that to the list of reasons why people are not buying a WiiU aside from third-party support, exclusives and online. So I don't know why you're complaining or surprised that people aren't picking it up. Sounds like you know very well why.

And it kind of is relying on nostalgia when they do very little of anything else. DK, Mario, Metroid, these are 3 decades old.

[P.S. From the first Donkey Kong Country to Tropical Freeze there isn't that big of a "re-invention" considering the 20 year gap.
Also, Mario games didn't just leap from the first SMB to Galaxy. It took 30 years and the first step in that direction was Mario 64.
It's not the 80s anymore. These franchises are no longer having a major impact on other game devs or the industry as they did back then.]

But you didn't just say "Nintendo makes fun games", you said that Nintendo is one of the only companies that focus on fun games. So yeah, you are kind of comparing.

"Nintendo established IPs like..."
Yes thank you, we know that they established these like 30 years ago, but no longer have much of an impact in today's gaming industry. So however old they are is irrelevant.
Sony and MS have not been around that long in the console gaming industry. Your request is illogical as Nintendo has 2 prior generations on Sony and 3 on MS. They DO have several successful franchises today and don't need to be decades old.

I'm comparing Donkey Kong Country 1 with Tropical Freeze. They're not an evolution of the original DK arcade game. DKC was an entirely different and unrelated concept by different developers building on the side-scrolling platforming other games like Mario had already established compared to the DK arcade game where you played as Jumpman.
Tropical Freeze and Returns are sequels to DKC1,2,3 and they're not that much revolutionary from each other, especially considering it took 20 years.