From the pre-lease GenCon (2009) special pdf version...
The best has just gotten even better! The Hero System 6th Edition brings new levels of flexibility and creativity to the acclaimed HERO System, allowing players to create any sort of character, power, gadget, spell, vehicle, monster, or weapon they can think of. Whatever you want to do, in any genre, setting, or time period, the HERO System 6th Edition rules let you do it.
The 6th Edition Rules come in two core Rulebooks, Character Creation, and Combat and Adventuring.
Some familiar Hero conceits (the hex-grid map, the Comeliness characteristic, the way Disadvantages are handled, etc.) are gone or very altered, and other small, but significant, additions are made.