Well, there have been ratcheting shifters in the past made by Hurst for 4 speeds and DN 5 speeds so the idea is nothing new.
The details on this one are very sketchy though, some mention of cables doing the actuating. I would have to see more details.
And there is no pricing shown, and I wouldn't buy anything from the Czech Republic sight unseen as you would have no recourse if the thing was a POS that didn't work. Maybe if someone in the U.S. becomes a dealer and they show more details.