I'd never heard of this either until now. I was a huge fan of the Pro Pinball series and played that game a ton. But it was always "video pinball" to me and not real pinball.
This project seems very personal for those developing it, and less a business venture. I'm also concerned that the left ramp is way too steep and long to be reliably hit - it's the kind of thing that works well in a virtual pinball simulation where the flippers are always 100% and hits seem to magically line-up, but in a real mechanical game, that ramp seems formidable.
I wish them luck. They seem to be yet another group with virtually no manufacturing experience much less pinball manufacturing experience, tackling a very big project. I'm sure it can be done, but it seems like every other project of this nature, it seems to take ten times longer and ten times more capital than originally intended. I hope they can finish it.