Like i said, anybody who thinks Pokemon GO or Super Mario Run are suitable replacements for mainline titles are unlikely to spend a few hundred dollars on Nintendo hardware in the first place.

Somebody who is strongly considering spending $200-300 on hardware for $40-60 games isnt going to change their mind because of free-to-start spinoffs with completely different play styles.

I think basically you're going to see a split ... the casual types who loved Wii Sports/Fit and maybe the odd game of NSMB and Mario Kart on the Wii and nothing too far beyond that are going to be very content with Nintendo games on iOS/Android I think. 

Where Nintendo could see a tangiable gain is young kids. Young kids generally graduate to more complex gaming anyway, so if they can get kids hooked on Pokemon/Mario/Zelda/Animal Crossing on iOS/Android, then you may have a shot at getting a new generation of kids. 

Probably a better trade off for Nintendo anyway, since the Wii/DS "casuals" weren't coming back most likely anyway, but now at least they can still make money off them while trying for a new generation of kids. 

The interesting thing is going to be what happens if/when the mobile games start generating more profit than Nintendo's regular games ... if that begins to happen, it could lead to a change in priorities. 

I think basically you're going to see a split ... the casual types who loved Wii Sports/Fit and maybe the odd game of NSMB and Mario Kart on the Wii and nothing too far beyond that are going to be very content with Nintendo games on iOS/Android I think. 

Where Nintendo could see a tangiable gain is young kids. Young kids generally graduate to more complex gaming anyway, so if they can get kids hooked on Pokemon/Mario/Zelda/Animal Crossing on iOS/Android, then you may have a shot at getting a new generation of kids. 

Probably a better trade off for Nintendo anyway, since the Wii/DS "casuals" weren't coming back most likely anyway, but now at least they can still make money off them while trying for a new generation of kids. 

The interesting thing is going to be what happens if/when the mobile games start generating more profit than Nintendo's regular games ... if that begins to happen, it could lead to a change in priorities. 

Possibly. I think that with the revenue that they could gain from mobile, and hopefully the new generation of kids that come in, it will encourage Nintendo to spend more resources, money, and focused effots (that they'll have gained thanks to mobile) to take more risks and be as bold with their franchises on their system like they were before the 8th generation. Like I was stating in an earlier comment.

Based on how they handled their Wii/DS success, I'd say that won't be the case. If you are making a lot of money doing something you'll more of that, not the opposite. 

Nintendo didn't invest in many "epic" games in the Wii/DS era nor did they invest in any new studio purchases or anything like that for the "epic" game audience. There was however a helluva lot more party games. 

True, and that did work for a while. But as soon as the casuals left them high and dry come the 3DS/Wii U, those party games started selling like crap compared to their predecessors or just plain crap in general.
Wii Sports/Wii Sports Resort: 82.73 million/33 million -> Wii Sports Club - 0.4 million
Wii Fit/Wii Fit Plus: 22.72 million/22 million -> Wii Fit U - 0.9 million
Wii Party: 8.5 million -> Wii Party U -> 1.8 million
 and most of the dedicated gamers that bought the DS/Wii and got burned didn't by the Wii U because of getting ditched in favor of the casual audience, leaving just the very core Nintendo fans, and by then the Wii U was already a colossal failure and the 3DS was entering its last legs, so Nintendo saw no point to it.
I think that this time around they'll have learned their lesson. The bright spot of mobile is that it doesn't really require much money or resources, and with the IPs they have, the revenue and profits >>>>>>>>>> costs and losses. Which will give them more breathing room and leeway to go all out with their dedicated systems and games.