The 'funny' thing is that you can buy the original two-side pedal powermeter (this time with Bluetooth) for 1699,90 euro and give the left (or right) pedal to your friend because it can be used independent of one another. So you'll be pedalling with the left pedal and your friend with the right. For 850 euro you are both be pedalling with power.
Also -like- Garmin, Look Keo added some new metrics with respect to pedalling dynamics. I will get back to those later in a more general post on these kinds of metrics.