Here's what he said in an
Argentine interview about it
-Any news about the Porcupine Tree reissues?
-Yes, in two or three years I would like to launch some special versions of “In absentia” (2002) and “Deadwing” (2005), with three or four CD’s. I have my sketches of the songs, demos of tracks that did not end up on the records, live material, B sides, things that we did in those periods, videos, surround remixes … a lot of material. I would also add texts about the recording, photographs and so on. Those are going to be huge projects, so I hope that people hold on until they come out.
The length of time he's projecting is disappointing but understandable given his schedule. Perhaps things will change and it'll come out sooner than that hopefully.