Is that so? I am not sure why there would be a noticeable latency. Wireless keyboards and mouse works fine from a distance. Besides, I am not suggesting using wifi for this, but a direct radio link.
"I think you might be confusing latency with throughput"
No, I'm not.
The problem with streaming video over wifi (e.g. Airplay) is latency, not throughput. That's why watching videos is fine (you don't care if there's a lag, as long as audio is travelling along the same path), but interactive stuff (like normal work) feels off.