Actually a while back there was talk of "rebooting" Thief into a modern game. So kinda cyberpunk instead of steampunk. You'd still use stealth and melee, and guards will mostly be melee based. Garrett again would be the main character (tho a bit modern). Dunno if that is the direction they are heading.
Here was a concept art of the "modern" Garrett.
http://www.digital-nightfall.com/garrettsketchthief4concya0.jpg
Here was a concept art of the "modern" Garrett.
http://www.digital-nightfall.com/garrettsketchthief4concya0.jpg