The 11.6-inch ThinkPad Helix will sport Intel's upcoming Core M CPUs while the Edge 15 is expected to be the Chinese manfacturer's thinnest 15.6-inch notebook yet.
http://www.notebookcheck.net/Lenovo-reveals-updated-ThinkPad-Helix-detachable-and-Edge-15-convertible.125569.0.html
Not impressed. Renders look nice, but the real deal will again be boring. And why a 840M? It's just barely better than the iGPU!
Probably this variant will soon get an update and they chose to go with the 840M to keep the price low but still offer a dedicated GPU for the money.