I would love for Deus ex to get A massive graphical upgrade. The game has awesome open areas that would be perfect if they didn't look like someone built them out of cardboard and shards of broken glass. That game with todays graphics would be breath taking. Also EVERY voice actor needs to be replaced.
I would Also love for the original Fallouts to be made into the Modern fallout style. I love the first 2 fallouts (havent played tactics yet)but it would be cool to see those areas fully realised in 3d.