We care about trees cut for paper, but seem to care less about where the unused gadgets go past their useability.
I also agree that the scariest part of going paperless is that there will no longer be imprints of this decade. Where documentation now is at the mercy of business-driven and rapidly-changing technologies, the stories and records of this decade may just end up where they can no longer be retrieved for the future generations.
A writer once expressed dismay over how he lost memories of his growing son the moment the digital cameras were born. And who would not be scared? Have we thought where have gone those brilliant ideas that were once captured by Wordstar or Word Perfect?