This looks very cool. The threshhold calculation and integration with Sufferfest videos is nice. Will have to give it a try next winter.
I've done the basic version of power training on my Kinetic trainer for a few years now using speed and the power conversion forumula from the Kurt Kinetic website. I dump the garmin file into Excel and then use the formula that Kurt Kinetic provides to convert speed to power and calculate the average power for specific time periods. It seems to be pretty accurate and even if it's off some watts, it's definitely accurate directionally. Kind of tedious that way though and it looks like this would automate that and give your brain something else to think about than how bored you are.