Shoot them an email if you're interested in the technology. They got back to me twice in a few hours. Since you torque the bars differently in each position, theoretically it should be possible to measure the flex, i.e. tilt of the unit in the horizontal plane of the bars (i.e shifter to shifter) and use that to see where you are.

The test in the past for calibration was done in your most aero position. So you'd have to redo it if you swapped stems or flipped a stem and such. Doesn't seem like too big of a deal.

The team that's using them has measured them against other power meters and seem to think that they stack up pretty well. Then again, they are sponsored, but they have provided data.

Edit: Email for tech support is atimmer@velocomp.com