DaCostaBR: Remember people, movies like For a Fistful of Dollars were pretty good, and Clint Eastwood's character sure as hell wasn't called Sanjuro.
InfraSuperman: That wasn't an official remake though, considering that Kurosawa sued Sergio Leone for plagiarism.
I think people also react differently to this because this is going to be the first live-action adaptation of Ghost in the Shell, rather than something being remade in the same medium. For some inexplicable reason, fans tend to wait longingly for live-action movies of their favourite comics, videogames, books, etc.; as if that's the only thing that can give those stories "legitimacy". It's pretty dumb.
The principle is exactly the same though, the movie wouldn't have worked had they not adapted it into a different setting. Same goes for The Magnificent Seven. If you want a more official adaptation, someone mentioned earlier Edge of Tomorrow which was also pretty good.
It's probably going to be terrible, sure, same as the live action adaptations that the japanese themselves make that are all garbage. But lets at least wait till we know what they're doing with this before we pronounce a verdict.