Conclusion: If you're looking for that narrow intersection of performance and portability, the Sony Vaio S 13.3 is hard to beat. You get the creature comforts of a big notebook (optical drive, dedicated graphics, full mobile CPUs) in a not much heavier or thicker than Ultrabook package.
Pros: Extreme power for an ultraportable, dedicated graphics, optical drive and full mobile Ivy Bridge CPUs.
Cons: No DisplayPort or monitor output higher than 1920 x 1200, weak speakers. Display is good but not great.