A cash grab is what they did with the sloppy re-release of Chrono Trigger, which is vastly inferior to the original game on original hardware - or running a ROM Hack with bug fixes (or even just the game as it released originally) in a cycle-accurate emulator.
Remaking a game from the ground up with AAA production values is a costly and complex endeavor - and a risky one too, even with a titles as popular as Final Fantasy VII, since there is no guarantee fans will enjoy it. Almost the same kind of high risks as with any other game production of this sort of scale apply here. And while I haven’t played these remakes, their reception seems to indicate that they are anything but cynical cash grabs.
Which one? There a dozens commonly used ones. All of these games are from the CRT era and were developed on and for CRT monitors.
Notice the dithering pattern on the characters in this screenshot:
https://www.mobygames.com/game/1619/might-and-magic-book-one-secret-of-the-inner-sanctum/screenshots/dos/115836/
This was only done for CRTs, since it results in blended pixels.
More CRT dithering everywhere, just two generations later and with more colors and fine detail - but it’s still the same technique:
https://www.mobygames.com/game/1513/heroes-of-might-and-magic-ii-the-succession-wars/screenshots/dos/634491/
https://www.mobygames.com/game/367/carmageddon/screenshots/dos/887670/
Notice the color banding on the textures? CRTs blend that together, resulting in a much smoother look even with software rendering.
https://www.mobygames.com/game/803/the-elder-scrolls-arena/screenshots/dos/305893/
Our old friend Mr Dithering makes an appearance once again.
I hope I’ve made my point clear. It’s fine if you prefer the clean pixelated look of LCD displays, but it’s clear that this is not what these games were meant to look like.