Another founder here, with some more comments on the tech side of things:
1. The software is relatively usable, and you can try it out right now on https://github.com/SimulaVR/Simula
2. The hardware is still being worked on, and the website is kind of a list of expected specs/placeholder in that regard:
2.a. The compute unit is tested and works, but requires a custom carrier board to fit the form factor. This is a blocker for the final product, but relatively low priority for the prototype.
2.b. Lens system design is scheduled to be complete in early November, with first prototypes available in early December. We're planning to use Valve Index lenses as a stopgap right now for prototyping etc.
2.c. We're currently solving a few challenges in driving the displays, as we're pushing the boundaries of the available technology, and at our volumes support from manufacturers is like pulling teeth. BOE supplies the 2880x2880 panels and there aren't even enough docs to figure out how to drive the (non-trivial, local dimming based) backlight.
2.d. We're also experimenting with different approaches to tracking as our original plan (RealSense) became end-of-life recently. I'm interested in an mmwave based solution, but we might just use RGB cameras instead.
2.e. The mechanical design for the front part is reasonably advanced, but we're still working on the back part.
There's a lot more going on right now that's probably not coming to mind immediately, but that should provide a good overview.