The subject says it all.
I tend to get despondent trying to read all the spec. and trying to understand them.
All I know is, I want:
Smart TV (definitely not sluggish)
Can get Netflix
4 x HDMI
I will keep the TV for several years at least.
My reasoning for an UHD TV now is that the content will come?
Will upscaling give me a better picture than otherwise?