not sure i agree with you - Prime has a decent selection, but is organized in a very frustrating way compared with Netflix. While netflix bundles tv-show seasons, you find yourself adding season after season to your 'watch list' on prime (which they only recently implemented - before that you didn't even have a queue). Also, their Roku/PS3 apps are much more painful to navigate with repeated movies (the standard def version and HD version), fewer categories, and i've often had problems where the movie/show will cut out consistently. More or less if i can't find the show/movie on netflix i'll search prime, but other than that, prime is best for the 2-day shipping.
If you're willing to pay for individual movies/shows (in addition to the $79 a year), Prime even has a much better selection than Netflix.