I remember how unbelievably massive this was in 1977, but I thought I was too cool to see it. It was always a part of my youth, though, and I got the DVD when it came out and enjoyed it immensely. Now I have the blu-ray and think it's even better.
There does seem to be a lot of clarity in many of the scenes and the colours look very vibrant, particularly in the disco. Despite all the disco clips we've all seen a million times, there's a lot more to this film than that. It's more about how Tony comes to realise that he's stuck in a rut with his juvenile friends and begins to think that there must be something more to life.
To be honest, the hi-def sound is nothing special, but that's not so important.
He hooks up with a good dancer, but she turns out to be a pretentious twit who thinks that she's better than the likes of Tony just because she works in an office in Manhattan and drinks lemon tea. I did feel sorry for Annette, the girl that Tony dumped as a dance partner, as all she wanted was for him to like her and treat her like a friend. Sadly, Tony was painfully immature and didn't redeem himself, but that reminded me of the times as well. At least at the end he recognised that he was out-danced by the Puerto Ricans and showed some class.
The "Back to Bay Ridge" extra was interesting, as many of the locations are still there.
Although the cultural significance of SNF is almost certainly lost on anyone under 45, this film was a giant of its time and has, to me at least, magnificently stood the test of time since then.