There were plenty of electric cars before the Model S. You might say that "electric cars" was a solved problem space. Around that time, Tesla was "selling rebadged European sports cars" in low quantities as a proof of concept. Of course there's no way they could beat GM and what their mountains of cash could put out. But Tesla steadily built out their Model S production, and rapidly became the poster child for the viability of electric cars. They have been extremely successful since.

I think it's entirely possible that a similar situation can happen in the PC space, and System76 believe they're positioned to do it.

Disclaimer, I do happen to be a web developer at System76. But the argument stands; you can disagree that System76 has the ability to execute on this vision, but after building a very successful business around Linux computers for 11 years, I happen to believe it's going to happen.