This was just a cool hack for fun, but there's another aspect to it: power efficiency. It might be getting 25% more throughput but using a GPU instead of a CPU

This was just a cool hack for fun, but there's another aspect to it: power efficiency. It might be getting 25% more throughput but using a GPU instead of a CPU may be consuming 2x to 10x less power. For some specialized use cases, even the difference can be much bigger. He probably didn't measure it but this is something that people writing software for embedded system-on-chips (SoC) think about often (this includes mobile apps, look at the number of reviews with mentions about battery life in app stores). It's very important as battery life and thermal throttling make a lot of difference in the mobile/embedded/automotive/aerospace industries.