listen up

the future of music sales

Most artists make their money on concert sales and add ons. T-shirts, stickers, collectibles, etc. Not CD sales. But is this the future of music in a world of digital delivery?
http://modlife.com/angelsandairwaves/love
A free CD, with the request of ANY payment? Nine Inch Nails and Radiohead have also tried their hand at the same thing. The Radiohead CD In Rainbows pulled an average of $2.12 per download. 3/5ths of 1.2 million users downloaded the CD for free. The remaining 2/5th paid an average of $6.
So is this the future of music sales? Will this be the future for other industries? books? magazines? Video games? I doubt it, but its worth thinking outside the box on.
How can you do what you enjoy, provide it to as many people as possible, and make up for it on the items that make you the most money?