Sony had 100 PS4s set up with games like Driveclub, Octodad, Oddworld New N' Tasty and Metal Gear Solid: Ground Zeroes. Consoles from Nintendo's Virtual Boy to Sega's Saturn and Sony's PS3 were there and there were sections of multiple consoles from different eras dedicated to a whole series, like Star Wars, which showed you the game through the ages.
I managed to play on an Atari Jaguar (which I've always wanted to do), try out the original Mario Bros. and play Atari's Star Wars. I also dabbled in some Octodad and some Metro Redux. On top of all this I met some fantastic YouTubers.
It was an excellent weekend and if you're into gaming then I'd fully recommend it!