Of course a download kiosk within the shop would be best, but I'm not sure the kind of bookstore I enjoy visiting could afford that kind of investment (hardware, software, trained staff, maintenance...), so the idea of getting a coupon or an e-mail with a download link isn't all that crazy to me.
I enjoy browsing books in a bookstore, but that's not enough to make me visit a bookstore, even if there's coffee

I need to know that I can trust the store staff to make a pre-selection of quality books that I can browse and make my own selection from. This, for me, is the advantage of a book store. And I don't expect that kind of service from big stores such as W.H. Smith or Fnac. For me these supermarkets of books have no advantage over Amazon.
I can imagine a future where Fnac has a download kiosk, but I'm not holding my breath because that kind of service would be no improvement over online stores, to my taste. I'm not sure there is a future for the kind of bookstore I like, but if this can help them, even a little bit, even for a short while, I'm all for it