I asked this question of the Zwift team shortly after starting the beta program:
“In the future will I be able to set up private group rides with my clubmates so we can do virtual training rides together?”
After riding the island initially with a dumb trainer, then moving to a KICKR, I have another question along the same lines:
“In the future will I be able to set up private group rides and filter riders by trainer type?”
The reason I ask is that when I moved to the KICKR it became extremely difficult to stay with other riders when cresting a hill, or on a downhill. I have to assume those riders were on dumb trainers (like I used to be) because they were able to keep a reasonably steady power level, whereas I had to shift to my biggest gear and up my cadence to an uncomfortable level to produce any significant power on a downhill. Even in the big gear with increased cadence I got dropped most of the time and had to chase really hard to catch them. (Sidebar: There is a lot of discussion on other threads about downhill physics elsewhere that show that I am not the only lightweight (69kg) who has this problem.)
So it would be a nice feature to be able to set up a ride/race that only allowed riders with the same trainer setup to join. If everyone is riding a KICKR, then everyone has to deal with the same physics.