You’re probably not set at native resolution. You want to be at 1080p or 1920×1080 (should have an option for one or the other in the video settings). And refresh would be at 60.
And there may be a setting on your TV too, for 1:1 pixel mapping (different sets have different names for this).
And just to ask the obvious, are you watching HD channels (because SD channels will look more noticibly bad on larger screens)?
