[Gandalf Parker]

Oh gee, why wasnt that considered? Sorry. Im not usually sarcastic.

But Steam has been discussed for as long as Steam has existed. So has Stardock, Tor, Torrent, and the MS distribution systems. Keep in mind that most of the systems are not just "add on". To make them work for the companies involved, they tend to have to go all one way or the other. Either DD or hard copy. Either mass produce, or on demand. Either marketing or publicity.