Assuming the staff travel trial works my guess would be that the next step would be a group of Executive Club members on a small selection (or even one route) of A-B routes (no transfers) where they can monitor and measure.
As for RFID, I was shown a prototype tag something like 7 years ago and we haven't seen any signs of adoption yet. That prototype could be printed as well so it could be used in airports without RFID and that made it expensive. They were talking about building the RFID tag into a case but the more I think about that the less I think it is the solution.
The Designworks piece talks about Bluetooth and I wonder if that might not be a better solution.