This earlier post might indicate otherwise:

spemanig said:

200m Miis have been created dude. You're lying to yourself. It doesn't matter if their relevence has been dormant. They were a sensation when they came out for years, and people loved them. Not just me - Hundreds of millions of people. You're anecdote means shit against raw numbers. The only reason the IP is dormant is because the hardware they were tied to is no longer relevant. The massive success of things like Tomodachi Life and Street Pass Mii Plaza is absolute proof that the Mii IP is still loved. That IP will explode as a social platform on such a massive social pool as the mobile market.

He's literally saying that Miis will "explode as a social platform", and that's what really sparked the nitty gritty of the debate.

Spemanig seems to use hyperbole a lot with his arguments, I don't think hundreds of millions of people were in love with Miis like he claims but I do agree that it was the poor sales of Wii U that have caused Mii to be less successful as of late rather than lack of interest in Miis is what caused Wii U to be unsuccessful.

I really think Miitomo can be a big hit on mobile platforms, not solely because of Miis but because of the social aspect of the app.

Not every new social app is a big hit. One that looks dorky and won't let you communicate very much at all probably won't be well-received by your average, non-Nintendo apologist mobile user.

I can be hard to tell whether some of the users on this site are using hyperbole or actually believe the things they say. I just don't assume such.

Honestly, it's perfect for mobile and pretty much puts the state of the App Store and Google Play in a nutshell. You're talking about a market where apps like Kim Kardashian's Hollywood are number one hits.

Bitstrips looked pretty damn dorky and were a big hit. How do u know how much communication it will/wont allow? There are also going to be mini games within the app much like Mii Plaza.

Boom - http://gamrconnect.vgchartz.com/thread.php?id=209817

Of course, with the level of self-delusion around here, I'm sure I'll be hearing about how 'Bloomberg' isn't a reliable financial news source.

I think Miitomo will succeed and I think Mii's will be an integral part of that. The Wii can be catagorized as a fad. Motion gaming can too. Miis, as an IP, were not a fad. People didn't stop liking Miis. They stopped liking games they were originally being associated with. Others are still successful. Tomodachi Life hitting over 4m isn't a fad. That's a smashing success on a platform with 54m users. That's nearly 1/10 3DS owners. For a game that is literally just about watching Miis do random shit.

Will they succeed purely because of Miis? Obviously not. Where Nintendo smart to use Miis instead of another IP? Absolutely. Like I said, Miis have a ubiquity that no other Nintendo franchise has, and the IP has touched hundreds of millions of people in a positive way. That isn't hyperbole. That's factual, recorded, cited information. Over 100m people. Going with Miitomo first was the smart way to go.

Over 100 million wiis sold, how many of the the people would know what the word "Mii" means today? How many of them created more than one? How many of them actually care about Miis in any way today? How many of them bought a Wii U or a 3DS? We actually have no idea, but assumptions are awesome, right?

But one thing we do know based on the Wii U (since practically no one but die-hard Nintendo fans bought it) - Die hard Nintendo fans buy well-made games developed by Nintendo in large quantities and practically nothing else. The success of Tomodachi Life is in no way an obvious an indicator of the mass appeal of Miis, it could literally just be yet another indicator of Nintendo fans buying a well-made Nintendo game.  it could have sold well in spite of the inclusion of Miis for all we know.

But hey, want to know a Nintendo franchise that actually does have estabilished mass-appeal, no doubt about it? Mario. But that's far less intelligent of a move then publishing a mii maker and chat program - of course.

Except these aren't people who have bought a wii u. These are regular people who have come around to my place and might just be keen for a bit of mario kart and smash. 

I'm not saying miis are currently popular. But from what I've seen people still enjoy them when exposed to them. And I think their integration can tickle some semblance of nostalgia as well.