When you're at it, also support bluetooth heart rate meassurement to calculate our real-time heart rate and overall calorie consumption while playing.
Seriously... I can't see any use of in-game clocks as long as dedicated devices are wide spread:
http://www.amazon.com/Frog-Talking-Alarm-Clock-II/dp/B002NHI262
The in game clocks in CIV where great and helped requlate the time. I could set the Alarm to stop play at a certain time. So you my not see any use for one but there are many of us that do find a use for one.
