The 3DS bump I think is a little overstated, it got a decent one in July, but even in Japan sales of 3DS are more or less back to where they were pre-Pokemon Go already.
Sure an app that has almost a billion downloads is going to help any brand, but the impact of a 3DS bump is sometimes overstated I think. Percentage wise maybe like 0.5% of Pokemon Go users bought a 3DS or Pokemon 3DS game ... that's still enough to cause a solid bump for a month, but lets not go crazy about it either. It's not as if 3DS sales have risen to DS or even GBA levels (even later in their lifecycles).
No one can question that mobile has had a monstrous impact on dedicated handhelds, at this point it would just be pure denial, when Nintendo themselves basically admits it.
3DS shipments even with any spillover from Pokemon GO and Super Mario Run will still likely be well below 10 million this year.
The main impact of Pokemon Go is the actual revenue it's generating, even if Nintendo is getting a minority cut of that, it will still end up being a huge wad of cash. That and the positive impact on the Nintendo stock price. Though I imagine Nintendo is kicking themselves for allowing Niantic to publish the game. That probably cost them several tens of millions of dollars in profit.
