You'll find that the original InfinitEye prototype actually pre-dates the Rift. And it's not just the resolution, it's the Field of View that makes this HMD special, soemthign the Rift in it's current form has no plans to address - unlike resolution.
Yes and the InfinitEye is 1280x800 per eye and has a 210 degree FOV. I'm interviewing the CastAR team shortly and I'm a backer, trust me. :)
CastAR has a lower resolution and a vastly inferior Field of View. It's also primarily an Augmented Reality solution.
You'll find that the original InfinitEye prototype actually pre-dates the Rift. And it's not just the resolution, it's the Field of View that makes this HMD special, soemthign the Rift in it's current form has no plans to address - unlike resolution.