This picture gets better the more you look into each nook and cranny, so many easter eggs. At the top right is Castle + Nes on rooftop, KGB ad right next to it, Coda as a cola reference, A64 ad, Vav as Vav Co, argarak atop the building, then Luigi64 atop the other building, Jessica Robo singing, bluenocturne on a lightcycle. I think there's some more subtle figures in the background, but I can't quite figure out who since it's shadowy and mysterious.
-Edit: Found mk7 and Sean in the windows.

Ahah there is also Argarak, and the motorycle is from Tron, but I think you saw nearly everything. On the roof top there are Jess, Hanna and Dami (you have to guess that one, you only see his back lol). And finally, the force field around the city is here because of "G-Police", an old game where cities are under domes, forcefields like this. A good memory.

I am blown of mind. So many cool little details everywhere :D