PS+ isn't required for Netflix and other apps only for online multiplayer (except for F2P titles). Also it works across all your devices and offers new games for free every month that are yours as long as you have PS+. Oh and it's also cheaper than Xbox live.
Some articles: PS+ vs Xbox Live and PS+ IGC vs Xbox Live GWG
Some articles: PS+ vs Xbox Live and PS+ IGC vs Xbox Live GWG