Digital downloads are mostly singles. If you count 10 singles as an album, then in 2004 CDs outsold downloads 40:1. That's going to change, but not as quickly as your paper suggests. Download sales cannot continue to triple each year indefinitely. Sooner or later, everybody will own an iPod, and everybody's iPod will be full.
Overall, digital downloads will probably NOT improve quality-wise, because that's not what the market wants. What the market wants is small and convenient. That's too bad, because just going from 128 kbps (the current standard for downloads) to 192 kbps would take you most of the way to CD quality, and still leave room for many, many tracks on a full-size iPod.
You might see the emergence of "audiophile" download sites, which offer higher resolution downloads--at higher resolution prices, of course. But if they happen, they will be even less significant in the mareketplace than audiophile labels are today.
Overall, digital downloads will probably NOT improve quality-wise, because that's not what the market wants. What the market wants is small and convenient. That's too bad, because just going from 128 kbps (the current standard for downloads) to 192 kbps would take you most of the way to CD quality, and still leave room for many, many tracks on a full-size iPod.
You might see the emergence of "audiophile" download sites, which offer higher resolution downloads--at higher resolution prices, of course. But if they happen, they will be even less significant in the mareketplace than audiophile labels are today.