I've been visiting Amazon.com as well as Amazon.in pretty often during my being online. I've bought a lot of 3D & Normal blu-ray discs that I watch on my PC's 24" Full HD Asus Monitor. Normal blu-ray discs are much better than DVD's in terms of Video / Audio quality No doubt about that. 3D blu-ray discs with Nvidia 3D Vision2 Glasses is just over the moon. I saw Jurassic Park pt I & Jurassic World both in 3D & awesome / amazing are mild words. In the last 3-4 weeks, on Amazon sites a new phrase is commonly seen " This is a Blu-ray disc remastered in 4k". While the titles in this category at present are few, they'll of course increase in a few months & hence I've the below queries:- a. is this a normal blu-ray disc? is it 25 GB or 50 GB or more? b. If it is BDXL (100 or 128 GB) that it can be read in drives that support BDXL? c. What will be the difference between a normal Blu-ray & one which is 4k remastered? This is specifically with reference to Video / Audio Quality?? If there is a big difference then of course some of the features of normal blu-ray will have been removed to make more space for the movie itself?? any idea what is deleted?? or is that augmented by increasing the disc size?? d. AM I wrong in saying that it may look grander / better on a 4K TV or 4K Monitor? but will look marginally better on a full HD Monitor than a normal blu-ray?? Spiderman, Angel & Demons are 2 titles that fall in this category at present. More will follow I'm sure of that. Any body who has replies to my queries may pls free to do so. Thanks in advance. Viraf P CHinoy, Mumbai - India.