How does stereoscopic 3D drives up the costs of game development considerably? Most games use a 3d engine anyways and it doesn't matter if the graphic is renderend from 1 viewpoint or from 2 viewpoints very close together.

The only thing they have to watch out for are graphic effects which don't work in 3D.

Threads like these (and I make them too, so I'm not criticizing) are exactly how I know that the Wii U and 3DS's days are numbered. You'd get crucified if a thread like this were made about a successor to the PS4 or XBO, because it's "too soon."

I see threads about Sony and Microsoft's successors too though.....

I wouldn't put too much stock in a thread since the majority of polls show there are a lot of Nintendo fans here....

Actually there are two ways that a Nintendo phone could get 20% or more of the mobile phone market.

Option A.) Nintendo is bought out by Apple and the Nintendo phone is a stylized iPhone for games.

Option B.) Nintendo is bought out by Google and the Nintendo is a stylized Andriod phone for games.

I've literally never seen one.

Yes, because the 3DS and the PS4 released the same year.

I've had this idea for years. When the Vita was announced, I was disappointed that the 3G model wasn't also a phone. Now that it's almost certain that there won't be another Sony handheld gaming console, Nintendo is my only hope to see how well a dedicated portable game with a wifi model and a phone model will work.

I agree in principle but the problem is that I think people expect more of Nintendo when it comes to their games. What i mean is that people are happy enough that Angry Birds on the iPad runs in a higher resolution than the iPhone version, their expectations of differentiation between the small and bigger screen versions aren't high because the cost isn't high and games aren't the primary function of the device.

Part of the reason Nintendo has had a measure of continued success with the 3DS, when the Vita crashed and burned, is that they understand handheld games and home console games are not the same beast. There are genres and areas of overlap but people have different expectations of the two. If all we were getting on Nintendo's future home console was up-rezzed versions of the handheld games e.g. streamed to the TV from the handheld,  I think people would be pissed.

I think we will see two separate devices, i think we will see uniform hardware architecture, a unified OS, unified account system but we will see some separate handheld games, some separate home console games and then shared games, where it makes sense. The only other way I can imagine seeing sharing of most games is if Nintendo works hard on the middleware and produces a very robust and essentially automated solution for down-porting home console games for their handheld. That way development could be focused on the home console but be playable across two systems. Of course there would be the opportunity for handheld specific games as well, for those who don't want to deal with the additional cost of home console development, but I think down-porting rather than up-porting would generally be a better approach. If this is going to be a viable approach though it means that input-wise both devices will need to be very similar, removing one of the differentiators that Nintendo has recently relied upon.

competing with phones would be too difficult for nintendo, is other red ocean, and seems nintendo has problems with red oceans...

I don't have an issue with most of you ideas although, I'm not sure how feasible the pricing part is. Games are actually quite reasonibly priced now. They haven't really increased even with inflation so software makers are actually making less on them than they used to back in the day, although digital has certainly lowered the costs associated with that. 

Nintendo seems to be working on the Nintendo accounts and it has really started with the NNID's, the problem with what you suggest though is that if they are the same as Xbox Live and PSN then they have the ability to be hacked as keeps happening to the mentioned. I don't really have an issue with friend codes though, do you? 

Again, they are working at associating the game purchases with the Nintendo accounts already, but they need to completely have the infrastructure in place before it goes live.