Or I could ask it to determine the kind of rooms that tend to raise my heart rate. Was it the color, the temperature, the height of the ceilings? Although it seems like wizardry now, this will be considered a very mechanical request in a decade, not very different from asking Google to find something—which would have been magical 20 years ago.
Nice. Memory is emotional - we remember that which has emotional significance, so using biometrics sensors (from an Apple watch, say), to record emotional metadata against the digital exhausts of what we do might provide an emotional means to index all that data with emotional significance, and hence be able to retrieve what we'd care about from all the shit we don't. This is akin to one of the functions of sleep - it uses emotional cues to index what is emotionally revelevant from the day into long-term memory, leaving everything else as more-or-less unretrievable binaries in space that is available to be overwritten. In the evolutionary design of sleep is perhaps a ready-made approach for us to master the insane amount of personal data we generate.
