Would this work with a slight sim?

There's a slight chance.

Would you need line-of-slight?

I have ideas for your simulator. Once you get it together we'll start chatting about your electronic plans and how we might be able to open it up to other devices.

This looks fun.
Do the eye cams work better than regular usb webcams?

Though my cardboard doesn't work too well with it, I did have it working with google's binaural audio last night. Basically walking all around a cube that was making sound and having it sound like it was there in midst of my path. GearVR worked really well. You need room to play around though.

Regarding the cameras. You could probably use whatever webcam but you have to modify the code and ensure the cameras you're using have the FOV and focal distance to give you enough area to work in. If you seriously want to do it, just hit me up and I'll give you whatever tips I can to modify it.

It'd be easier to just buy the eye cams. I just have too many web cams cluttering up the place.

Totally, you would have to calibrate each new camera to in order to get the focal point and all the lens info for the 2d to 3d conversions.

The Eye cameras are real versatile too. In the future I hope to take the ones I stripped down for IR viewing and use them for pupil tracking experimentation. Lot of potential there.

Over the holiday, a friend and I tinkered with his Gear VR and Riftcat to poke around in Elite: Dangerous. SDE and font-size issues aside, the experience was fascinating. But given the issues, it feels like VR isn't quite there. Close -- a headset w/ focal adjustment was a leap forward for me (glasses having ruined my experience previously), and was enough to make me look at options for my Nexus 6P, especially to see the early Daydream apps.

GearVR, while impressive for a phone based solution, doesn't compare with the Vive. If there's a microsoft store or gamestop near you demoing a Vive, it's worth checking out. Positional tracking and tracked controllers up it to a whole other level.

Unfortunately no demo stores within about a 2 hour drive. Its on the list of things to do on my next visit to Atlanta GA. And my problem with Vive/Rift/etc is still lack of focal adjustment. Severe myopia around -9D means my lenses are too huge to wear comfortably under a headset, custom lenses will likely be as much as the Vive itself, or I have to get contact lenses and pay out of pocket, which will be the probable route I take if the tech keeps advancing and doesn't present a solution for eyesight like mine.

Ah, yeah. I still have my last pair of contacts that I only wear for special occasions, like when I know I'm going to get a chance at a decent headset. Though I actually have a plastic cardboard that I can wear my glasses in. Who knows what the future holds.