In a nutshell: Core i7 is for gamers and enthusiast/power users. By enthusiasts/power users I mean people who use photoshop, do some video editing, streaming, models for 3d printing, etc.

Whilst the number of pixels within a monitor cannot be changed, and therefore 4K footage when displayed upon a 1080p screen will never quite hold the same sharpness, the 4K

It is impossible to splice a HDMI cable. the signal path, attenuation and various other components will be stuffed. Can Cat5 be used for HDMI? HDMI Over Cat5 HDMI is