What is the use of a book without pictures or conversations?

"And what is the use of a book," thought Alice, "without pictures or conversations?' (Alice's Adventures in Wonderland by Lewis Carroll) - the question gains a new dimension, now that eBook readers reach the price of a decent paper book. That is what a hard-bound book did cost when books became widely available to the general public - a lot of money but somewhat affordable to many. Given the price/value ratio of electronic stuff compared to wood-based stuff, digital books will soon be cheaper than books on paper which will result in books on paper becoming even more expensive. We are still in the "imitation phase" - we produce electronic books that imitate books on paper - once we get beyond this phase - the question Paper or Plastic will no longer be relevant - in the same way Theater or Film? Radio or TV? Film or TV? Painting or Photo are no longer of relevance.