Those able to make it to QuakeCon in Dallas will be able to check out Arkane's Dishonored for themselves:
During the event, attendees will also have the opportunity to play Dishonored, the supernatural assassin action game under development at Arkane Studios, and DOOM 3 BFG Edition, the full collection of genre-defining games from id Software, in Bethesda’s booth in the Exhibit Hall. […]
QuakeCon 2012 will take place at the Hilton Anatole Hotel in Dallas, Texas on Thursday, August 2nd through Sunday, August 5th. The event is free for general admission attendees thanks to the support of id and Bethesda Softworks, as well as the QuakeCon volunteer staff and the 2012 event sponsors and exhibitors.