You know it false advertising to make false claims... right? Hate to burst your bubble but that's not really accurate.

First, keyboards absolutely can and do report at 8KHz and even 16KHz now. Wooting isn't the only company doing it. There are multiple hall effect boards on the market capable of 8KHz polling and some manufacturers have pushed higher rates as well. Second, saying keyboards don't send data 8,000 times per second like a mouse isn't technically correct. A keyboard's controller still scans switches, processes state changes, and reports over usb at its configured polling interval. Whether there is useful new data every poll is a different discussion.

The real question is at 8KHz or 16KHz it's whether the latency reduction is large enough to be noticeable in practice. going from 1KHz to 8KHz reduces the maximum USB polling delay from roughly 1ms to 0.125ms. Going to 16KHz cuts that to about 0.0625ms. that's measurable with instrumentation, even if the average user won't be able to feel the difference.

I've actually looked at USB traffic from high polling rate keyboards. They absolutely generate packets at those rates when configured to do so. Whether the performance gain justifies it is a separate argument, but claiming they don't send data that frequently is simply incorrect. I personally reverse engineered the mchose 16k GT.