Music industry could follow the opensource model

The new Radiohead album has an interesting marketing concept. You pay what you want for it...
-Yes- in the shopping e-basket you put the number you want.

Since Radiohead is part of my favorite bands, (Ok Computer rocks) i decided to give it a try.
I've often heard people claiming that they download illegally music on the web but then buy the CD if they liked it. Here that's basically what i'm doing, right now i'm downloading it (at 600Ko/s, that's cool) but entered a price of 0.00. If i like it, i will go back and chip-in, iTunes gives you an idea of a fair amount for downloaded music i think (10Euros/album).

Now, i'm sure they are not crazy, most of the money made around this band is probably on concerts and marchandising anyway, the business is changing, they adapt.
It's just a marketing trick, i would not blog on them if it was just any new CD, marketing worked.

Now what does it mean for the future ? Shouldn't records be free after all, and indirectly make money through the concerts ? Should music industry follow the software industry ? Think professional opensource. Give away the meat (Software or music) but bill the access to the butcher (developer or rock star).