They explained what went into this decision:
Each generation of Tablet PCs, brings us faster processors, more memory, bigger hard drives and generally longer battery life, but those are expected improvements. Those things alone are not impressive or exciting enough to put a Tablet into the running for the “Editors Choice” Tablet PC.
The Editors Choice Tablet PC only changes when something comes along that offers features and options that exceed those of the current “Editors Choice” Tablet PC. An Editors Choice machine needs to be light, powerfully, easy to travel with, offer advancements in technology and have reliable manufacturer support. The Lenovo X60 offers all that and more.