Would be cool to be able to see some kind of a "geek passenger instrument panel" with this information during flight. This would definitely influence my choice of an airline.
With the transition to wifi entertainment that seems to have been lost, but would be pretty interesting to make a timelapse or be able to create a personalized dashboard from the raw data.
Which was awesome until that time across Newfoundland, when someone started asking about the heavy turbulence. The other aircraft in the vicinity had no consolidation, recommending to “strap’em in and ride it through”. I spent the next several hours waiting for my worst flight, which never even happened.
The coolest thing I've had was being able to listen into the pilots' radio.