However, some analysts, like Rob Enderle of the Enderle Group and Dan Olds, of The Gabriel Consulting Group, noted that Google has to make sure the new features work well, or users will simply get annoyed. And annoyed users will leave Google for Bing or Yahoo.

"Voice search could prove iffy and could end up being like the first attempts at handwriting recognition," said Enderle. "There could be too many variables - ambient noise, microphone quality and speaker's accent -- all make this difficult to do well for large numbers of people."

Olds, though, took a different tack, jokingly noting that Instant Pages could be as annoying as that person who answers your question before you've finished your sentence.

"But in Google's case, the answer is usually right, so I don't have the overwhelming urge to smack it," he added.

However, he wants to know more about what happens to the images people use in Image Search. "Users should think about it before they run their pictures through the tool," he added. "When they do that, they're essentially uploading the photo to the Web. What happens to it after that? I'm just not sure."