I don't think you need to be poking around in source code to realize something is different or unique when it comes to tech. The whole point of these sort of competitions is to foster new ideas, try new things, innovate, and be creative. It should apply to the tech side as much as the art, audio, or gameplay side IMHO.
For example: if a game was completely ray traced, or perhaps a game where all the assets were generated procedurally like .kkreiger. Having a category for technical creativity, innovation, or prowess gives incentive to try new things.
Neither of those things would qualify as "new" tech at all; both have been done before.
Even if you discard the "novel" aspect, that still doesn't answer the important question of what the judging criteria for "technology" would be?