I was interested in the Kindle, but three things have held me back.
First, its still a bit overpriced.
Second, while they will hold your backups for you, supposedly, I have already heard of cases where the backups disappear if they decide to discontinue that item. The fact that you’ve paid for it means nothing.
And now, swiping a book you’ve paid for right off your instrument. That clinches it for me.
I’ll buy a hard copy, or a pdf that I can own and copy myself. No longer interested in Kindle as a product.
I think it's unlikely to become a common occurence. I'm certainly not going to worry about it.