So, does that mean that the game will sell gangbusters?

This reminds me of them lines at the Nintendo NY/World Store for a launch day for a new game!

It should translate well into sales, however the problem will still be that people lack the hardware. Nintendo problem has never been software quality (Minus some key examples), it has always been limited userbase for content. If the NX does well, this will do well. 

8hrs wait to play the Zelda demo. Only Zelda.

I always felt that their hardware didn't sell well because their games only appealed to a relatively small section of the population and they insist on making similar games over and over again.

I think about going to the E3 showfloor sometimes, but then I see stuff liek this and think, why even bother.

Nah that isn't necessarily true, see handheld nintendo market for example. 

Zelda's line for the day full in 4 minutes.

http://www.neogaf.com/forum/showpost.php?p=207348723&postcount=1735

!

You gotta catch 'em all! 

Update to OP:
Running for the "Zelda: Breath of the Wild"game play line!