I think this whole debate on whether cloning will be illegal seem to stem from a very specifically American point of view. After ten trips to the states I know how big this stem cell and cloning debate is over there, but here (Sweden) for example you don't hear any fuss about it at all, it's more embraced than anything. Our society isn't even a fraction as religiously based as the US, and our ethics and values reflect that. I don't know anybody who has a problem with cloning or stem cell research, and from what I can tell from the media, neither has anybody else really. There is not much of a debate, mostly just enthusiasm and looking forward to when these technological advances become standard practice.
There are all sorts of technological advances that can be abused, just because something can be misused doesn't mean there'll be laws against it, or you'd have to ban everything under the sun. From my perspective, I see it as _far_ more likely that cloning will be allowed rather than banned, based on the society I live in today. So, unless current American laws are to dominate even the distant future in the "United Systems" or whatever they mention in some movie, I don't think we can make any assumptions that way.