Bash quote:
<Handy> Japanese scientists have created a camera with such a fast shutter speed,
<Handy> they now can photograph a woman with her mouth shut.

From: http://www.bash.org/?537155

... Okay, I'll go get my coat.

Just because hard drives increase in capacity does not mean that I have to fill it up, and fill it up with just music.

For comparison, let's take my own personal case. I'm 17, and my entire music collection clocks in at somewhere around 3.6 G (ridiculously small compared to the old timers 'round these parts). But that's 3.6 G including a whole lot of songs I don't listen to.

Indeed, most of my current music comes from free sources like jamendo, where artists put up their music under CC (or similar?). So, if I wanted to, I could easily, and legally, download music to my hearts content to fill up my 8 gig iPod. But do I want to, or even need to? No.

I'm not going to bother generalizing trends, but from what I notice from the habits my peers is similar. I have friends that walk around with 80 Gb in their pockets, and yet only fill a small portion of that with music. The rest they fill up with movies, or use it as a really large usb stick/small portable hard-drive.

So yes, while your numbers do illustrate your point, I question their relevancy and applicability, at least in my environment.