It's too...big

Comparison of images sizes: average HD, 17" and b&w 9"

Devin Faraci at CHUD is lamenting the fact that TOS Star Trek does not really survive the transition to HD and a large screen.

The long shots looked amazing, but as soon as the camera cut to a close up of someone's face, I was filled with horror. Make-up drips off everyone's face, but there's still not enough foundation to cover the lunar landscape of Sulu's cheeks. And one of the boasted about improvements of the HD version of Trek - that Spock's skin coloring was, for the first time in history, presented as originally conceived - was the most distracting. Spock looks badly jaundiced, and his lips are a deep pink, like Nimoy was gorging on cotton candy between takes. His ears are egregiously fake, and I think you can see the line between the prosthetic and Nimoy's real ears on a number of occasions. The only thing worse than Spock's thick yellow make-up, though, is the way that it often just stops at his neck, really fakening up the whole image.

He's right of course. Star Trek was never meant to be viewed on anything as large as an average HD screen. I once saw an episode on a movie screen, and the wooden doors, zippers and make up became a distraction. That, and after having seen the 2nd Matrix on Imax, I can say some things where never meant to be that...big.

Read more here.