I don't even know if there are many movies originally shot in 4k... and you won't see any difference between 4k and 8k if both displays are calibrated to same brightness and color levels.
Didn't watch the video, but 4k needs way less processing power from tv to handle motion correctly.
I thought about getting 4k television but panels have been same basic panels last 3-4 years, all made by LG. Maybe next panel generation but not yet. And it's not just tv but player and movies... i have about 5-600 HD-movies and at least 50 of those should be in 4k if i get one... Means 4k-player and 4k movies will cost at least same as tv :0003
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