I know we're not hurting for questions on SE:Patent, but there are still only a small number of contributors (who are to be commended for their dedication and knowledge!)
The idea is it could make sense to have IP law in general under a single stack, because sometimes on Patents copyright or trademark comes into the discussion. (I've found personally that for my own project, which involves a type of consumer software, I need a general grounding in patents, copyright and trademark, because all three are part of the IP equation.) It might be beneficial for patent people so see the copyright and trademark questions, and visa versa.
I don't know if this is a good idea or a bad idea, but it is clear to me that SE:Patents is useful. Patent law is a highly esoteric field, and even surveying law review sites can leave the layperson confused. Having a place to come and ask questions about these subjects is invaluable, imo.