I think without trying this opinion before a court, you have no idea.

Samsung may have reserved the right to modify the software, but I've literally seen smart tvs from Samsung that have a "Netflix" button on the physical remote.

They have shipped tv boxes that clearly and prominently display the Netflix app on the tv.

If the Netflix button on the remote no longer works, the tv is not doing what the user bought it to do and what it was advertised as being capable of.