Not far. Most of the features, it seems, do not really require the notebook. But it also seems that it wouldn't be difficult to eventually add support for any old notebook to allow for automatic alignment.
So when you say....
> Requiring special paper automatically limits the feature's utility.
...I can't help but think it allows them to get the feature out sooner before refining it.
> Once their "limited edition" notebooks sell out
they'll be offering normal edition notebooks, as well as providing better support for other notebooks.
I really don't see the features here as something they are just going to limit to a limited time physical product.