The problem with the remaster is it's quick nostalgia trip. Nothing more. There will be no longevity whatsoever. I absolutely loved COD4. The game that started it all for me. 10th Prestige, hundreds of hours. I have zero interest to play it because it will be a total "been there, done that" feeling. I have no desire to play it.
I find the remaster curious. I'm not really sure who it appeals to. Most people that I know that loved it back then, have moved on to other games and they're certainly not going to pay $80 to play it. Call of Duty fans are all about the new one. How could you be a "current" COD fan and choose to play and rank up MWR when you have Infinite Warfare?