Kate Bush's first three albums ("The Kick Inside", "Lionheart", and "Never For Ever") are still owned by Parlophone Records, so I can easily imagine fantastic deluxe hardbook sets with 5.1 surround for each of those albums (similar to the Jethro Tull and Marillion reissues the label has been releasing)
It appears that Kate Bush owns the rest of her recordings, so the buck really stops with her when it comes to reissuing some of her best albums (like "The Dreaming" and "Hounds Of Love")
It's great that Steven Wilson is so passionate about remixing Kate Bush's catalogue, but if she never reciprocates the interest, well, so much for that...