do you have a blu ray player? how about netflix? etc or does your new tv have that built in?
mind you netflix on a ps4 imo should be a lot better than netflix on a smart tv, due to the processing power and it being a much more powerful system in regards to everything smart on tv's is usually pretty crap tbh.
it's a wonderful games machine first and foremost though, but i would take the blu ray and smart aspects into consideration.
mind you, you could sell it for £300 and get a blu ray player for dirt cheap.