Also, it seems to me, 3d printing a heart is one of the most complex organs to replicate. Wouldn't we start by mastering 3d-printing of less complex (and still useful?) human parts such as valves, veins, or hair?
The complexity of the heart is weird -- there's a lot of physical structure that's important, but at the same time I believe there's relatively little differentiation: it's mostly muscle; it's not a kidney or a lung. It's probably directly the opposite challenges to skin -- skin probably has more internal differences, but the physical layout are likely to just be laminar sheets.
(I am not an expert on biology.)
A friend I knew had the top part of his heart replaced with a leatherized cadaver graft, after suffering from a massive infection under the pericardium. He died about 8 years after that.
Veins and valves and hair issues have some avenues for treatment and don't necessarily result in death.
I haven't read the paper behind the press release, but I'm skeptical of claims about 3D printed tissue. The primary obstacle in the heart is having a perfusable network of vasculature that is simultaneously mechanically & electrically functional. This requires intact extracellular matrix as well as functioning cardiomyocytes & supporting cell types. Maybe that's just my bias though (I'm an author on: https://www.ahajournals.org/doi/full/10.1161/CIRCRESAHA.115....).
Source: I lead a tissue engineering project to print human organs for transplantation.
That may make it a suitable target if you want to start out with a boom and getting some PR, while first "products" out the door would be less complex ones.
The Israeli state at large is massively subsidized by the US govt., which is politically palatable under the auspices of "National Security", whilst subsidizing science and research in the homeland is increasingly decried as "socialism" and other such conservative scarewords. In recent years the amount of direct US aid to Israel (a nation with 3% the population of the US) has been half the budget of the NSF.