Apple didn't even bother refreshing the Home Sharing interface and you think they're going to add Siri Search to it? The best case for Home Sharing users is to use Plex and pray that the promised universal search API can be made to work with it.
Oh Lordy, Lordy, I'm praying hard on my knees that this is the case, It would literally be madness not to when that API is finally opened up.
Not saying this because I have issues with home sharing or Plex as is, but when that API is open I want all data in all apps to be indexable at the developers discretion (with appropriate user facing privacy settings where applicable), not just streamable video apps.