Man, the net running bit is kinda fun sounding with it being very dangerous and whatever.
It's Lain. Pretty neat.
I disliked it for being a walking simulator, but something along the lines of Observer's memory sequences would actually be really neat for passing through the black wall.
Didn't play it, but if it's something in-your-face trippy, I kinda hope not.
I'm imagining a meta-internet virtual reality. A place where, on the surface, people use it for entertainment purposes. Visual splendor, maybe some physical feedback implants... you know, classic Brave New World soma type stuff. But then beneath it, sophisticated hackers, governments, corporations, and criminals use this virtual reality to broker information, launder money, make illegal and/or covert transactions, etc.
Picture this: You enter this meta-net, and if you stay shallow, you can easily enjoy it and extricate yourself, but the rewards are similarly skin-deep. But if you stay too long, turn down the wrong alley, pick up the wrong item, speak to the wrong NPC, accidentally (or maybe even purposefully) speak a certain password in dialogue, or whatever else, your consciousness gets trapped -- but you don't realize it's trapped.
You get trapped, and go through the normal procedure of backing out into base reality. And there you are running around, thinking you're in base reality, but subtle clues start filling you in that you never left the meta-net. Rather than pulling yourself out, you went in deeper, and need to figure out how to escape or risk your body starving to death.
The rewards for going in balls deep could be great though; you might find highly restricted and valuable information, make powerful contacts in the real world, intercept a transaction and take it for yourself, etc.