This blu-ray presents the film in 2.35:1 cinemascope with a great lossless DTS 5.1 sound upgrade and it looks terrific. The added detail has an effect of adding beauty (the opening water ripples of Saul Bass and co's credits) or atmospheric detail (everywhere else!). The HD format has been a big benefit for the presentation.
Extras are a whole 'nother story:
There's a SD 1991 "behind the scenes" (ie. EPK video) which adds not much, except that Martin Scorcese rather disappointingly refers to the original as a "perfect B picture" and Wesley Strick turns out to be a mallflower teenager with a goatee - yikes!
There's also a SD compilation of Saul Bass credit sequences, including Vertigo, which are pretty nifty but completely superfluous unfortunately.
I love this film, for the record, but I think I prefer the original. This one aspires more to realism in characterisation, while the original used archetypes to tell more of a fairytale/fable kind of approach. However, this one adds some religious connotations, some of which works and some of which doesn't. I never really get a good feel of why Max Cady would want to (sort of spoilers) try Sam in a Book of Job fashion. I get that he got all up his own bottom in prison trying to make himself better than the rest of the prisoners and fixated on a higher kind of revenge, but it never really coelesces with his other actions, which remain those of a petty crook with an inflated image. You could argue that inflated image is what's given to delusions of grandeur, but the film seems to play up to the idea that Cady's trial has some grander, perhaps even spiritual value.
The real reason all this stuff is here? To make the film seem, sigh, "deeper" than it really is. Scorsese mentions some of this stuff in the "Making of"/Behind the Scenes fluff, but he seems to have little to no idea most of the subtext in his film was there in the first place in the first movie.
Very confusing stuff! The film, however, is still a Hell of a good watch. I suggest you do what I did, buy both Cape Fears on Blu-Ray and get The Simpsons Season 5 out of your cupboard (or buy it if you don't have it) and watch both Cape Fears, followed by "Cape Feare", the excellent Simpsons parody. Now THAT'S an evening of entertainment.