I am very eager to find out what the price will be for these motors, this will have a huge impact in General Aviation. A banal 4 cylinder 100 HP petrol engine is ~$20,000 ("aviation price") and the weight is a bit over 60 kg, if my math is right a Magnax motor can be as light as 5 kg (even 10 kg is fabulous) but the cost needs to balance the huge price of batteries: the $20,000 petrol engine with 140 liter fuel tanks gives a flight time of almost 10 hours, batteries for that flight time would be insanely expensive and possibly quite heavy. But most people don't fly more than 5-6 hours, so a reduction to 6 hours would be acceptable for 95% of the people.

Another positive impact to GA is you don't need to adjust for mass and balance that much, batteries have a fixed center of gravity that does not change while discharging, while fuel tanks impact the plane's center of gravity as they go from full to empty. Less trimming, simpler flying.

And not the last, it is eliminating any problems with carburetors, mixture, air density or inverted flight: none of these affect an electrical motor, but it needs to be considered for the likes of Cessna where you need to adjust the (fuel/air) mixture depending on the altitude.

And it improves propeller efficiency, simplifying constant speed propeller operation. It can be easily fully automated.

All good news, but seeing it happen is a different story: it can take 3 to 5 years, more that a decade or never to reach mass availability and adoption in general aviation. It has the potential to make the market explode (in the positive way), but there is so much politics involved there are chances the status quo will be maintained. Let's see.