Given how much was raised by the company itself (~$200M according to https://www.crunchbase.com/organization/north-8daa) the acquisition seems like Google providing an exit opportunity for the company and its investors, arguably much better for the ecosystem than what Amazon does
How is buying a company that clearly was not doing well financially (acquisition price at $150m, ~$200m raised with the last $40m being a debt financing, so it is a bail out), in what is clearly messaged as an acqui-hire for talent, in any way comparable to Amazon using its investment arm to acquire confidential information and replicate company products?
Respectfully, the author doesn't seem to understand what's actually going on here, this seems like a standard acqui-hire for future work on a smart glass product within Google. I highly doubt North didn't know they were going to be discontinuing the Focus before the acquisition closed.
What would have actually been unethical is waiting for North to run out of money and then try to hire their people at lower salaries or something.
Why? It would have been riskier. With aqui-hire they get everyone and someone else could scoop them. But at the end of the day the North team failed to make a product that sold.
(Hypothetical Alpha Centuarians observing and pirating the tech would have no ethical issues at all, there is no social contract, they aren't even accessible and couldn't pay even if they wanted to being lightyears away but that is a silly tangent.)
In the same way, I would also be very interested in any further info on Ellsworth's Tilt Five projectors, bottom right-right of [1] (full text of interview [2]). Interesting video with info on the (retroreflective) optics system here [3].
[1] https://web.archive.org/web/20200722042213im_/https://i0.wp.... presumably shows three generations of the product. From left to right board, camera and projector.
[2] https://skarredghost.com/2019/09/24/interview-jeri-ellsworth...