Then we obviously didn't see the same teaser...
Honestly, I thought it looked more fake in the HD teaser, speaking as an amateur CGI artist (though hoping to change that eventually) who thought that the still of the Enterprise was gorgeous.
I've often noticed that CGI which looks photoreal and beautiful in stills looks fake in animations. Screencaps from an animation that looks terrible can look pretty damned good.
Though it definitely looks better in 1080p!