zerocoin is definitely the future, and I'm more than confident that over time many projects will introduce some of the details of this algorithm to themselves. Of course, even the lazy Bitcoin developers are already looking towards the algorithm. It's only a matter of time.
Yes, developers bitcoin core lazy, they have not heard the news for a long time))
They have already come to success, and they do not really need much more. Of course, I think that they are developing the project, but not as fast as before.