[looklookatme]

Not to rain on your parade here, but eighty percent accuracy would require every sixth keypress to be backspace. Likely promoting it to the most pressed key.

Obviously, auto-correct mitigates this somewhat but for the amount of frustration and lost time, I'm betting it's probably worthwhile just purchasing a new keyboard.

[gojomo]

But what if the keyboard – unpowered and wireless – were designed for this purpose, emitting unique sounds per key, perhaps even outside normal human hearing range?