Solid media will be dead in the next few years... you want software for your Mac or iPhone you don't get it on a disk, you get it from the App store.
You want music, the vast majority these days are sold through iTunes, Amazon or Google Play.
The Amazon kindle store is the most popular book store in the world.
With growing video streaming services such as Love Film, Netflix, Sky Store and others it will only be a period of time before all media is provided digitally IMHO.
It's a cheaper distribution method and it makes dealing with piracy easier, the next generation game consoles will be cloud based gaming services as well imho