They'll probably do that for the second generation so that people can upgrade their watch without buying a new strap.
I'm thinking they won't package the second gen with no strap. IF I bought a second gen I would get it with the sports strap and move my SS Link to the new one. I would then put the new strap I just got on my old watch to sell it to someone who cannot afford the gen 2 watch.
There are going to be plenty of resale's of gen 1 just like the iPhone. I finally dug my iPhone 5 out of the drawer last weekend and it sold on CL for $300 in just 10 minutes.