The future of book publishing is an ever fascinating and fluctuating topic among writers. My favorite tidbit today are the sage words of a professional writer-friend:
"I can see the day approaching when a PRINT book is a rare, 'specialty' item, much like people buy vinyl albums produced today in limited numbers, they will buy a print book produced in limited numbers. From what I see and hear, electronic publishing is leaping ahead and I don't think it will be long before it overtakes print publishing." -- Cliver (busy reformatting someone's novel into HTML for Kindle) Citriria Publishing.
You might try keeping abreast of current trends and opinions at, http://mickrooney.blogspot.com/2009/11/harlequin-thomas-nelson-harlots-of-new.html.