Earlier this week, Google (GOOGL 0.55%) released an updated version of its search app, Google Now, for Apple's (AAPL 1.27%) iOS. It includes a voice-activated assistant similar to Siri. The development may be the next case of Google undermining native software with an app, as was the case with Maps, or it may be a weak competitor that never gains traction. Ultimately, the type of user interface promises to have many applications, so investors should be anxious to see how the story unfolds.

In the video below, Fool.com contributor Doug Ehrman discusses Google Now, some of the ramifications of its success, and what to watch for in coming months.