I used to think the same way, Semi, but these days games don't come with manuals, and the box and disc artworks are terrible. I still have most of my PS3 games on disc, but I have a fair amount as digital downloads, and scrolling through a list to pick something to play is a lot more convenient than waiting a disk to spin up.
EDIT: As for the XBox, I'm not impressed. I've pretty much come to the conclusion that I'm not, never have been, and probably never will be MS' target audience. The controller looks nice, but that's about it.