Yes, no, kindofThis assumes I know what I want to watch, but I can't remember all the movies and TV shows ever made. None of these sites have a content directory to browse in? Like the TV Guide.
You can simply scroll through what they're putting up on the home screen or browse genres of content and after you use the services enough it will get better at what it recommends to you on the home screen. However, scrolling EVERYTHING that a service offers is too exhaustive to do.