If eBooks Soar, What Will Book Fairs Look Like?

At Thrillerfest this week, Gina Centrello, President and Publisher of The Random House Publishing Group, said that in five years eBooks will be 50% of book sales.
With that in mind, what will book conferences look like? Above is a stack of books from Thrillerfest today. Will this site be a thing of the past in five years? Will we instead see a stack of promocards with codes to download books? Or will there just be a good conference website where attendees can log on with their Wi-Fi enabled book readers and download the eBooks?
Somehow getting your Kindle signed doesn’t seem as appealing, as having a print copy signed. But perhaps inventors will come up with a cool way to do this.
What do you think?