Why are folks so keyed up about 4K? At first glance, that's the type of question that answers itself: by definition, a 4096-pixel wide image delivers around four times the resolution of 1920 x 1080, and that's a healthy multiple. It's actually of a broadly similar magnitude to the difference between 1080p and old-fashioned analog NTSC video, and nobody these days questions the value of that upgrade. On the other hand, there must come a point where pixels cease to be visible in a home theater environment, such that buying more of them at inflated prices stops being worth i
