Earlier quoted context omitted.
You could have some inflatable cushions that can only be controlled by the cloud.
In app purchases for additional per-seat licences! HealthKit integration! Share the data with your health insurer! "Uh-oh, you exceeded your sitting quota by xx hours this month, so you've been charged a penalty fee of $xx. Don't forget – keep moving to keep saving!" It's a world of opportunity...
I am sensing a market