Ok, my 3d display thing is getting a bit long winded for FB, so I'm going to post it up here.
It's actually really simple and effective. I was expecting a much higher hill to climb.
If you want to see what I'm talking about and have $7 to throw at something neat, you can pick up this 3d viewer. I know, "Hasbro?"... but it works.
The focal length is off, but it doesn't need any tweaking to use.
Go Here and pick up a game (sorry, there's only 2 for iPhones)
This will give you an idea of what this stuff is all about.
You'll see first hand what I mean by "true 3d". It's not a gimick, it works.
The kicker though is the head tracking. It's not as intuitive when you have to hold the display, but you'll get the idea. I suggest a dark room as well since this has no blinders and light from the sides kinda wrecks the effect. Oh, and sit down. Preferably in a swivel chair, but standing can be problematic.
If that peaks your interest, it's not far to go to have a full headset. There's a commercial one that you can just buy and they're stupid-simple to make.
The stuff I'm going to do goes beyond this point, but even just having the display that works with a few games on a cellphone is pretty stinking impressive.
Beyond that, it gets interactive and that's where the real fun starts.