As noted on the linked page, the Computer History Museum will demonstrate the Babbage Difference Engine for the last time at the end of this month. After that, it will be returned to it's owner (Nathan Myhrvold). It's been at the CHM much longer than originally planned, which is a good thing, as I only got to see it in operation just over a year ago. If you haven't seen it, I encourage you to make the effort, it's an amazing machine.
This is a significant loss for the museum, but they have a lot of other excellent exhibits and I'm sure they'll fill the now-empty space with something great. Or maybe they'll help build the Analytical Engine...