You can have the site randomly pick from every single gosh darn thing that's on Netflix, or you can limit it to either just TV shows or just movies. You can also relegate your choices to specific genres, like anime or comedy. Now, Netflix Roulette doesn't promise to actually offer up something good, but it at least gives you something. And sometimes when you've been browsing through that red screen for what feels like hours and you can't seem to find anything you want to watch, that's all you need.
h/t David Shaw