It's likely that GL will release yet another 'vision' of how his trilogy was 'supposed to look like in 77, 80 & 83'. When will this be? Possibly in 2007 - the 30th Anniversary of SW?
Maybe some time after he's finished Episode III we'll get an orignial trilogy and prequel trilogy combined box set - and don't be too surprised if there are changes to the prequels either...
At the cinema? Certainly wouldn't put it past him - another last chance to see the films as they are before he makes a catalogue of new changes to them as he did for the 97SE's...
Then there's blu-ray or hd-dvd or whatever the next new format is going to be - all new chances for GL to make a few more $$$