I brought a SONY 55 inch "smart tv" and would not recommend it to anyone. I end up using my LG blu-ray player to access the internet to stream movies from netflix. There are many things stating at $50 for a roku that will let you access the internet better via wifi and cheaper then most smart TVs. Check out Consumer reports they have suggested not buying a smart TV.
I have a LG Smart TV and honesty the smart feature are a bunch of apps, most of which you have to pay extra for.
For instance I have Amazon Prime and they offer many movies for free but you must be a Prime member.It's also a 3-d TV and besides the WOW factor I haven't watched any 3-d movies.
On the other hand I didn't pay a $500 premium and the picture is amazing.