If there is the building blocks of an open protocol identity blockchain that is built and encrypted for each person and understood across a single platform then all you would need to do after uploading the data to your blockchain is authorize access to blocks in the chain to applications you utilize. The applications that could be built to sift and use the data are endless.

You could build a dream application that uses the schema tags for dream-journaling and gather data about common dreams, symbols, how often a dream is in color or includes a smell, accounts of all sorts of information that are so hard to collect reliably.

You could build a facial recognition application that sorts through images and finds doppelgangers​ and people with features similar to yours and the movie industry could utilize that technology to find doubles and bodyguards could utilize that technology to find stand-ins.

You could build image comparison applications that locate images from the same location and locate images that contain the same shapes, colors, value transitions, any number of algorithms that you could detect and you could use that application to sort your own photos or find missing people!