This is a true treasure trove. I still need to rewatch with Sondheim’s commentary but the picture quality has obviously been lovingly restored as good as it can probably ever be and I appreciate that they largely kept the natural grain intact and didn’t try to filter it or at least over filter it. I too was confused by the boasting of a 4K restoration knowing that a regular blu-ray release is not 4K resolution. Rest assured this is indeed a regular blu-ray that will play just fine on any blu-ray player and it’s worth it.