The best replacement for 4k is 1080p.

The best alternatives to 4k are rated as following:

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Speaking about 4k, one probably shouldn't forget about ps4.

Other search terms related to 4k and their ratings are:

★★★★★	ps4
★★★	mac pro

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Scale is based on the average worldwide traffic of 4k in all years. Click on graph for more.

1080p

oled