Let's do another one of these... Do you think Tron is cyberpunk?
The majority of the movie takes place inside a computer and the bad guy is near the head of an evil corporation, but is that enough? The characters in the movie range from scientist to a computer programmer who owns his own arcade. Not exactly low-lifes. And the only thing that could be considered high-tech is a prototype laser in a laboratory currently under research. Otherwise, it's a perfectly ordinary modern-day setting. There's no breakdown in society, there's no massive wealth gap on display (unless you count someone not getting recognition for a video game he wrote).
So are the visuals of a world inside a computer enough to call it cyberpunk?