Actually, I was wondering if there was any picture benefit to upgrading to HD? I know there's no sound benefit as they're still Mono (or Stereo?).
There are some fantastically cinematic shots in "Manhattan", but I generally don't really see him as a particularly stylish filmmaker, his films are more about characterisation and dialogue, not sweeping vistas and a cast of thousands.
I still have 500 or so DVDs and they look damn awful. Maybe 200 will never receive HD treatment and that's a shame.
Allen's films in HD look fantastic compared to anything that came before it even the slightly dodgy Nordic releases of his later -less funny- films look amazing and get me close to how I seen them in the cinema.
The DVD image of Everyone Says I Love You is miserable compared to the far from great Blu-rays releases. After that -except for Sweet and Lowdown- I've not liked anything he's done and most of it is unwatchable and samey. That Amazon film Wonder Wheel was just about OK it's a pity he lost that deal (but not the money if he wins his court case) as it gave him some bigger budgets.