In theory the 4000 which adopts Epson's 4K enhancement technology will project sharper video images than the 3100, though the 4000's resolution is simulated by flashing the 2 million pixel Full HD 1080p sensor twice per frame which is half of the 8 million pixels of the true 4K resolution.
As I...
The $1,499 is a really cool price for a 4K projector, but I'm afraid the UHD50's 2000 Lumen brightness might limit the display effect of the 4K source materials. According to my observations, 4K projector's price can be reduced to about $1500 but the brightness must be under 2000 ANSI Lumen, or...