In AutoCAD 2014 you can customize the behavior of the command line using controls in the Input Settings menu when you right-click on the command line. In addition to the previous options to enable AutoComplete and search for system variables, you can enable AutoCorrect, Search Content, and Mid-string Search. All of these options are turned on by default.
Another right-click option provides access to the new Input Search Options dialog box.
Much of the new command line functionality, including AutoCorrect, mid-string search, and adaptive suggestions, is also available using dynamic input.
View command input settings and other Command line enhancements in the AutoCAD 2014: Command Line video.