I would love to see the creators of Digimon games take full advantage of their concept of digital beings living in a digital world.
I'd like to see the company capitalise on this by creating an app where people can truely have a digital companion. It should go further than the widget attached to Rearise. It should have your chosen Digimon overlay the homescreen so it can interact with the entire screen and the stuff you do. Beyond this, they could consider integrating fitness (like the V bracelet - but use existing apps), habit tracking or to-do list and even, possibly, mental health and positive living. These things could be tied into the Digimon evolution trees and help determine future forms. Imagine having a little Digimon roaming on your screen encouraging you to complete tasks you've aimed to complete that day and being rewarded with potential evolutionary lines.
Honestly, digital beings living in a digital world isn't a stretch anymore, it's possible.