I so hope optimism is justified, but after the Duke turned out to be an average and partially "consolized" FPS, I'm a little pessimistic. Anyway, chances are that it won't be as good as the first Deus Ex, but it will be a lot better than the second.
Edit: let's just hope they remember the 10 Commandments of PC Gaming http://gamrconnect.vgchartz.com/thread.php?id=130442&page=1#