The newest is not what you see on other TVs, PCs and such. To get the last version offered we usually only need to check the Samsung web page for our model for new firmware (I defer to Samsung how to install) and then install that, along with a remove (if it offers such) of Netflix and then install Netflix. Not all models have this feature so you just install the latest Samsung firmware and you are done.
How to download the newest Netflix app in smart tv

Chowhound
Comic Vine
GameFAQs
GameSpot
Giant Bomb
TechRepublic