It's not that difficult to see the throttle position sensor values, via OBD-II with something like a ScanGauge.
My car's ECU reports the TPS values, and I don't think it even has electronic throttle control.
I address e-ink before (basically for me the contrast sucks) but most people hot on ereaders seem to like it:
Nothing will ever be attempted if all possible objections must be first overcome. -- Dr. Johnson