Otherwise, there's not a thing that this offers, that's worth shelling out another 300 bucks.
I have the original 4K, and watch it all the time. I'm glad it has the double-tap Home button (swipe up to kill the app). I use that feature a lot.
And yet I have 4 of them in total because they are much better than the built in apps and I don't trust the TVs to connect them to the internet. It's basically CarPlay for my TV but does an excellent job because of the consistent interface and good apps.
I am in no hurry to get this latest version.