Re: Hell Officially Froze over for me on the 21st of January 2015...
I doubt AR will cause illness, not like VR can anyway.
With VR you have no view out to the real world, only the generated one. If that generated world isn't grounded somehow to the real one, you start to feel sick.
As an example, in a sim game, such as Elite Dangerous, you're in a cockpit, the vr world might be whizzing around you outside the cockpit, but the cockpit itself is static to your body (if not your head). But it's enough to fool your head. I've played for hours at a time with no issues.
But play an fps, and that changes rapidly for some people. I managed about 30 mins before needing a break!
AR helmets like this let you see the real world, so no confused head, as long as it doesn't try taking over your entire vision anyway. So I can imagine people being able to use this all day long without any real issue,
Looks quite cool too, unlike the Rift currently ;-)