Any material packaging or delivery method will need to add value to the audio content. Many reissued albums add value from their liner notes: Why this artist is historically important, their biography, who they played with, and so on. Some liner notes are now actually small books. Some artists have fun with it: Kid Koala's "12 Bit Blues" CD comes with a DIY cardboard turntable! Sometimes the material object is important in the aesthetic of the act, band, or artist. The advantage of a physical artifact is that it can encapsulate a lot into one focused experience, unlike a bunch of MP3's and a PDF booklet and a vanity website...but, to Rene's point, the younger generation might not have the patience for that.
But is that a fallacy? Will the simple fact that MP3's (or their future replacements) are so easy to hear, trade, and swap create demand for richer experiences? Will people start to realize that rich Web experiences are possibly more expensive than printing a gorgeous booklet, and isn't portable to all devices at all times (given URLs' dependence on internet connectivity)? Will albums come in decoder rings or some other weird artifact? Portability of the music experience will probably trump everything, which is why cassettes gained popularity, as did MP3 files a generation later. But that doesn't preclude a "mothership" container of some sort, whether it has higher-fidelity audio material or a bunch of extra content, or both. (Which the vinyl LP is still great at today.)
There will always be a hardcore group of listeners who crave something more, whether it's reinterpretations (visuals, videos, live shows) or context (liner notes, stories, etc.). Whether these things come in boxes we buy or virtual collections of media is a question I don't think anyone can answer. I suspect these things are cyclical, like many trends, but each cycle mutates a bit, so I'm excited to see where artists and performers go to further engage with their fans.
Who hopefully value their work enough to BUY SOMETHING...