@Justin
It's a pretty serious toy already, and thanks to your code nsippet,we are close to have a good basic toolkit of color correction ! How cool is that ! :P
Some users don't just use the essential video display capabilities but are doing all their video editing with it (like Jon from ReaperBlog).
But yes sure, we all know REAPER is an audio software, and none of that will replace the fancy features of a video editors (like GPU acceleration for ultra fast render, advanced compositing etc).