Infusion founder Greg Brill (no relation) demos image recognition on Surface...very cool stuff...and he does it Ginsu Knife style!
I think suggests some incredible possibilities. The book market seems off, though.
1. How well will this handle highly similar images like books in a series.
2. The combination of antialiasing and low resolution of Surface make extensive reading uncomfortable.
3. The cost of maintaining purchasing and maintaining a number of Surface units in a retail store seems out of line with the volume/margin opportunity on $30 books.
Still, this is a stupidly cool interaction!