Technically, they did cap prices after the "I am rich" app.
Back to the subject: I expect prices will rise to whatever the market accepts.
On the one hand, that may be less than what it currently accepts, because a) people expect lower prices for non-physical goods and b) there may be more competition.
On the other hand, production prices for 'books' might increase by orders of magnitude if publishers insert lots of interactive stuff (but I guess many textbooks already ship with CDs or URLs, so that effect may not be that large)
Back to the subject: I expect prices will rise to whatever the market accepts.
On the one hand, that may be less than what it currently accepts, because a) people expect lower prices for non-physical goods and b) there may be more competition.
On the other hand, production prices for 'books' might increase by orders of magnitude if publishers insert lots of interactive stuff (but I guess many textbooks already ship with CDs or URLs, so that effect may not be that large)