For most people buying a TV today, the answer is straightforward. Here is why.
For anyone buying a new TV today: get 4K. At current prices 4K costs almost the same as 1080p and delivers a meaningfully better picture. 1080p is now found only on budget models.
3840x2160 pixels. Approximately 163 PPI on a 55" screen. Pixels invisible at normal viewing distances. Standard on virtually all TVs sold today.
1920x1080 pixels. Approximately 92 PPI on a 55" screen. Pixels visible when sitting under 8 feet from a 55" screen. Now found mainly on budget or older models.
4K lets you sit approximately 30-40% closer than 1080p before pixels become visible:
The practical conclusion: The 4K vs 1080p debate is over. 4K won. Buy 4K. The price premium is minimal on new TVs and 1080p is being discontinued.
Our calculator accounts for both 4K and 1080p in its recommendations.