If the active elements were convex instead of concave, I can imagine this being useful for people with visual impairments. How does this compare to existing technologies for braille displays?
The present US government would delight in finding a new way to funnel more yachtloads of cash to Larry Ellison, legally or otherwise, as long as someone in the regime gets something out of it.
Cosine similarity of two normalized vectors is just the length of the projection of one vector on the other. That gives a very intuitive geometric meaning to cosine similarity.
https://en.wikipedia.org/wiki/Vector_projection
It boils down to the DoJ wants to force "Super Apps" like WeChat. That is something I absolutely don't want because then everyone will be forced to use it, like in China. Super Apps are what's intrinsically anticompetitive.