Sony doesn't technically have an ultrabook — the VAIO Z or VAIO SB doesn't really count — but it seems Sony's planning to look at the category sometime in the future. Labeled as a "future ultrabook concept," Sony's displaying a laptop that looks a lot like its current VAIO Z. Unfortunately, it's behind glass, but from what I can tell it has a different touchpad than the current VAIO Z and is a bit thicker. That's all I could really glean from the chassis trapped behind glass, but it seems very likely that Sony will join the race at some point this year. Now, let's just hope that external GPU and docking station comes along for the ride.