The demand for vinyl and audiocassettes - affectionately called "tape" back in the day - gives me a few insights:
1) Nostalgia sells really well, and extends into vintage technology (re: one generation behind).
2) With information practically overwhelming people online, the linear nature of vinyl, and even more so for cassettes, makes for a more focused information stream - it's a very relaxing mode of data appreciation.
3) There may be a backlash for the Internet that is happening with the younger generations. I hope it leads to an eventual renaissance in how people deal with the online world.