They paid to make the reviews twice as good as deserved and it turned out average.
The game is quite pathetic to say the least. The story is shite.. no worse. The whole city is littered with paint splashes and scratch marks to advertise designated climbing spots and jumps. The legendary rope arrows has been diminished to obvious tools for advertised "special" wooden spots and doesn't require two seconds of thought. The guards are stupid and the game is easy even without any handholding, so what remains after turning off all possible help options in the settings? The game is still easy and your hands are still fairly tightly held. It baffles me that some designer thought it was a good idea to have the player bashing one button to open a fucking window... and if you choose to go back out the same window the process must be repeated.
The graphics is good and some cutscenes made me laugh. It was fun in a masochistic way, one could't quite forget how incredibly stupid the game was but it's the last Thief game so it had to be played. The worst in the series by far... It's also worth noting that when you're not in sneak mode, your head (camera) is attached where your bellybutton would normally be. When in sneak mode you're even lower...
PS. I also struggled with finding the right FOV setting in this game. Too little and the world becomes flat, too much and you get motion sickness. I normally never struggle with this...
PPS. I forgot to add that I actually recommend the game as it's not really bad entertainment. It's just a whole lot of wasted potential, it could've easily been so much better if developers weren't so damn caught up in catering for the slowest and dumbest of human beings with a potential wallet.
EDIT:
There is no reason why this graphics should require so much power on a PC. I suspect a conspiracy to sell more GFX cards. Dishonored use the exact same engine and its graphics are arguably better but didn't need much hardware at all. It may also be that they've been lazy and saved all textures in DTX5 or higher when in fact only a few of the textures require such a compression level to be at its best.