SuperNova on 10 December 2015
Do unreleased games count? Because Cuphead just looks soooo good.
Other than that Yoshis Woolly World always blows me away with cuteness and attention to detail in the art design, like the the little fuzzy glow the Yoshis have around them from the wool fibers sticking out.
I also loved Rayman Ledgends and Child of Light as well as the initial Zelda U reveal.
I tend to be more blown away by interesting art design rather than pure technical capability (even though that certainly plays into it) so I can't really remember the last time a game with 'realistic' graphics blew my mind. I did think Star Wars Battlefront is pretty, but I'm not really blown away by it.
