Overall, I agree that the game is worth purchasing, but there are some issues in this review..
The resolution issue is with the internal framebuffer meaning that increasing your resolution does not improve visual quality. This won't be an issue for everyone, though and has been fixed by fan-made mods, anyway.
Also 60Hz does not mean 60 FPS. The game is still capped at 30 FPS. This won't be an issue for everyone, though, especially since this is still a higher framerate than the console version!
Also, keyboard and mouse would work fine with the game if they'd bothered to optimize the controls properly, but it still works perfectly with a gamepad. The only issue is, is that if you don't already own an Xbox pad that this is an extra expense just to play this game; games like the Arkham or Assassin's Creed series control much better with a gamepad but work fine with a keyboard and mouse. This is borderline unplayable with K+M and that's just not acceptable.
Still, the game is definitely worth buying.