Integrate with fitness-tracking apps like Garmin Connect, UA Record, MyFitness Pal, etc.
I would like for ManicTime to go beyond "work tracking" and be my single "life tracking" app. To do so, it would have to gather up data from my various life tracking sources. For instance, I would like to have a view of my running/cycling/swimming training, my calorie consumption, and my sleep history next to my work history to see trends. (Some apps also track "mood"...that might be interesting to see along side work activity!)