This is great! Use case: I'm at home and want to check out the latest book by VE Schwab. When I do a search, Vega automatically assumes that I want to search at my registered library location, but my registered library is not my local library. The search results say there are items checked in, but I can't get to them. So I apply the location filter to my search for the nearest branch, and see that while there isn't a book format currently available at the nearest location, there is a large print. Removing options that are not available at the location being searched helps me as a customer know if there are available formats, and if there are NOT available items for my search--saving me a fruitless walk to the library.
This is doubly important for consortia, because it will help the user save time by knowing what's available at their closest location.