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:
"An idealist is one who, on noticing that a rose smells better than a cabbage, concludes that it will also make better soup." - H.L. Mencken