Fun little project. However--I'm now slightly concerned that websites have access to accelerometer data without any kind of privacy prompt? There must be a browser setting here somewhere, but again, would love to have different settings by default.
Is this -currently- the case? Highly unlikely. But will someone seek to profit from these data in the future? Probably.
“We show that accelerometer readings are a powerful side channel that can be used to extract entire sequences of entered text on a smart- phone touchscreen keyboard.”
Pending research to the contrary, I would assume that what is typed on the keyboard of a laptop can be recovered through the accelerometer by an application running in the background.