With the explosion of internet and possibility of music sharing, the industry has to adopt drastically offering music downloads at attractive pricing.
I think it is difficult to kill music sharing today, and almost impossible in the near future. With filesharing services (as Rapidshare) and sites like Youtube the speed of music distribution will increase exponentially.
Apple is well aware what is going on and they are adopting quite well (for now).
We will see more and more specialized music sites addressing different public and prices will go down. The question will be how to reach wider audience and attract people to still buy music i.e. to make it less convenient for them to use the (illegal and free of charge ?) music sharing options.
Price and the speed of delivery (downloads) will be the key balancing factor.
Watch sites like hdtracks.com, linnrecords.com and many others take a swing - which is good, for music will be more and more accessible also for people who presently cannot think of spending money on music.
The music industry as we know it will dissapear, and there will be less and less physical music carriers (SACD, CDs, DVDs).
And this is without any new ground-braking technologies in music recording & reproduction...