What is all the fuss about a second analog on a handheld? Why is it so important?

[sensebringer]

theprof00 said:

sensebringer said:

If Nintendo is doing this to get the FPS hardcore player they have gone mad. there is no way the pretty graphics worshipers/FPS freaks are going to get a 3ds over a vita because this people think that nintendo consoles have "shitty graphics" and Nintendo games are for "little kids".

If they were inteligent they would only go after the Pokemon, 2d Mario, Mario kart, animal crossing, brain training, Puzzle quest, professor layton, Phoenix Wright, Nintendogs and Rythm Heaven crowd. They are making the 3ds the N64/Gamecube sucesor, not the DS sucesor.

If you let your opponents take the niche gaming genres and gamestyles, you will eventually only be left with an increasingly competitive mainstream market.

That is how companies get disrupted. Nintendo knows all about that.

Please explain me the bold part. I have heard the term but I don't understand it very well.