I am a student and I worked with publishers last semester for a while to get interactive electronic textbooks published. I got to view things on the inside and what I've concluded is that the publishers don't actually care about students.

They are marketing to the schools and universities first and foremost because they are the ones who actually make the buying decisions. All the publishers try to do is make something that looks better their competitors and lets colleges cram more students into the classrooms. I don't ever remember them saying "students need this" but rather "universities want to see this". It is a broken system that relies on lazy/overworked teachers and massive hulking collegiate bureaucracies.

Good electronic textbooks won't come from companies that made shitty paper textbooks.