Using a Kurt Kinetic Rock n Roll trainer I my speed is based on zPower. The current display panel shows power, cadence and heartrate. The power varies a lot. When trying to ride on a “solid power level” I use my Garmin Edge 800 and keep the same speed.
It would be nice to have an option to customize the current display panel, power as an 3s average.
An other option is broadcasting the data (everything? cadence, hr, power, speed) In that case a third party device, like the Edge 800, with custom display options can do the job.