This is way too outdated to be relevant in any way. Back in the day they had a board with a TPU on it, before everyone else did. That board ran object detection at a pretty good resolution at like 80fps in 2.5W power budget. I still have that board in my drawer - I never did find any use for it at its price point. Plus, because it's Google, I expected that they'd abandon the board within 2 years tops, which is exactly what happened. The board was like $100 IIRC which was a good chunk of cash when RaspberryPi was like $25. Nowadays there are _dozens_ of Chinese boards available with on-chip TPUs. Tooling still sucks mightily, but that's expected when dealing with embedded systems. Unlike with the Google board, you can usually build your own Linux for these using Yocto or Buildroot with minimal tweaks.