First, this is an HD resolution test. Be sure to use a display with a native resolution of 1920x1080p/60 and turn off all optional signal processing features that will obscure the test results of the signage player [i.e. use 1:1 pixel mapping, turn off scaling, image enhancement, noise reduction].
Second, take a look at the digital signage hardware specifications. This is the first category for consideration on the scorecard. Is it commercial grade rated to perform reliably for years of 24/7 operation? Is it a consumer system rated for 16/7 operation?