Games, regardless of how great they are, don't blow my mind unless they can come up with an incredible plot twist or have some amazing new features. With that said, I'd say that the last time I felt blown away by a game would probably have been Journey.

The last cutscene in a game that blew my mind was probably FFXIV:ARR, which managed to get a character I didn't care much for in a storyline I didn't care much for and have a plot device I didn't really bother myself with much and put out a change of events that isn't exactly mindblowing in itself and turn all of that into something that left me watching it over and over and over and over again, because hot damn that was incredible video.

More recently, the ending of Lightning Returns blew my mind in that for a brief moment I genuinely thought that it was real and that Lightning was just superimposed or something, because the landscape and whatnot was that well done. So that blew my mind for different reasons.