Having paid $350 for the Reader, it's going to be a long time before I buy any hard copy books!
No happy Amazon boxes for the foreseeable future unless they contain gifts for others. In a few years I'm going to be retiring and moving to a smaller place with very limited space for books. I'm going to face serious choices about what books will be retained in my permanent library. It's a comfort to know that I'll have hundreds of digital books at hand. However, my very favorite authors I will have in hard copy and in digital form.