Vaio Carbon Fiber Notebook:X505TXSZ (premium)TZZTTGMain advantage: stronger than same weight and thickness of magnesium alloyLighter (cut around 60-80g compare with magnesium aluminum alloy)Thinner (you can see that the screen is so thin)
the screen so thin depends on your panel ,not the cover. x505 is not led panel. others are led panel.
Thickness mainly depend on LED or CCFLBut using carbon fiber case can be little thinner ba (you can compare SR with Z)