Grrrrrr... that's what I figured was going to happen. Still, I'm going to have to show Tron to my nephews before taking them to the sequel (since they've never seen it)... and now I have to do that on standard DVD. (*gasp*)
I was really hoping to have a shiny new HD transfer by then.
(Incidentally, since the DVD is out-of-print, I expect that used prices are going to go through the frigging roof when Tron Legacy hits theaters.)