No no, I have read on sites that they are including an ethernet port. No way they could make you have to use wi-fi. Do some more research, there are plenty of sites out there.
In my EGM magazine I remember reading that there would only be wi-fi built into it, they can't just toss an adapter on there. You'd have to get the 399 package with a router. If you don't you're still stuck with a wireless only adaptable package.