70+ million is a good number on its own, but Nintendo needs far more than that for it to the foundation of their business. Doing half of what you did in the last generation shouldn't be spun as a good thing.

Nothing is selling 150 million units this gen, I think even PS4 is going to struggle to hit 100 mill if it does ever. 

3DS will probably finish close to 80 mill. DS/Wii numbers are never happening again. 

Lets reverse it really ... I think Sony should give up on the Vita and support Nintendo's next handheld platform for the good of the industry. Or Microsoft should get in on helping Nintendo's handheld. They'd increase profits for their gaming division and help the industry that's being cannibalized by mobile. 

If Nintendo were to embrace mobile in a real way IMO it's effectively the end of the traditional Japanese game market as a whole. There will be nothing left. 

Any one in Nintendos management that believes going mobile will save the company needs to leave

Which is why people say that they should focus on the markets that are growing.

To underlined, why? Sony hardly ever supported the Vita (a platform whose success had a direct effect on their business), what makes you think they'd give meaningful support to platform they didn't own? If Sony stopped making a handheld, they'd stop making handheld games all together. Only focusing on mobile and console titles.

Also, mobile gaming and handhelds are in the same industry. Supporting the 3DS over mobile is supporting the dedicated handheld market, as they'd be able to make money on both sides.