As you surely know, Test Track is scheduled to receive a major rehab next year that would include the complete renovation of the ride and its theme (without altering the track itself). As part of this future project, Test Track will start testing new technologies that may be incorporated in the attraction next year:
"We often test new concepts and technologies in our parks as part of our ongoing innovation process to make the entire Guest experience even better. As part of that effort, we will be testing a new technology at Epcot at Test Track, December 6-7. The technology we are testing may or may not end up as part of our park offerings."
Once again, sorry for copying the knowledge from another coaster site but, it seems to get the info long before anyone, I for one would be interested to see what they will be testing, sounds good to me!
The source was from here