4K Resolution is 3840 × 2160.
The current 16 Inch MacbookPro has a screen resolution of 3456 × 2234, which is almost 4K but not quite.
I would immediately buy a 4K Macbook. Netflix and Youtube would be in native 4K, instead of a 1440p or 1080p scaled up stream, 4K HDR is amazing. UHD video...