The future of deep learning is photonics
spectrum.ieee.org
spectrum.ieee.org
https://lightmatter.co/products/
who, BTW, I believe have a horrible homepage. Greek letters, large nondescript images, useless source code. It looks more like yet another hipster dating app than like breakthrough hardware research.
And it seems the product page focuses mostly on their admittedly amazing fan design and less on what's inside that pretty cooling box.