To ensure 90% of the population could likely not spot the difference, you would need to place a 50-inch 4K TV 5.9 feet away. To extend this threshold to 100%, it would need to be at least 6.8 feet ...

Engadget staffers spend the entire year poking, prodding and otherwise testing the latest tech gadgets. So we’ve got a pretty good handle on what’s unique and interesting right now. We put together ...