Many people require the second hand offered in a normal analogue watch - for example, many health professionals who are interested in monitoring their health activity require a second hand to measure a patient's pulse. The lack of this feature has prevented me from purchasing a Withings watch. The option to monitor this on the watch face would be wonderful even if this did result in more frequent charging - the trade-off would be worth it for me.
This has been discussed in other posts, but under the Steel HR/HR Sport Forum. I am hoping it could be brought to your attention under Feature Request.