I think ppl who wanna buy, they will, after mp3s as well. And the one who dont wanna buy, the wont. It was the same even before the whole internet shit, ppl just copied stuff, or ignored them.
And about promotion and net.. Without downloadable stuff, I'd have never bought or listened to any Antimatter or Anathema music. All I know I only know it from other peoples sharing. Without the net, I say its 100% that I dont know them now! I never had any magazines, never seen any posters about them, never had any friends lending their cds. And I know many people who shared it, and ones that got songs from me and got influenced, so all I know there are some dosens of cd-buying music lover customers around me, who would have never got into this music at all without the net.
And dont forget that our guys here still have no fckn MTV or VIVA played music video hits like. For less popular styles, for independent stuff, the net is big help. It gives people a chance to choose quality.