Looking for open ideas

I am pursuing a project on Tracking learning and detection in a video stream. For that, I have read the paper titled " Tracking-Learning-Detection" (http://epubs.surrey.ac.uk/713800/1/Kalal-PAMI-2011%281%29.pdf). But as this paper was written in 2011, most of the future work mentioned here has been accomplished. I would be grateful if anyone can guide me on what all open ideas I can still work on? Any help is appreciated. Thank you.