'Google Instant' On Smartphones: 4G Implications

 The beauty of "Google Instant" is that it could save users a lot of typing on a mobile keyboard, which is a hassle, especially if your phone has no physical keyboard. But there is another angle of importance to mobile service providers with fast 3G connections or 4G.

The use case might be that a user starts with voice search, which then displays results as the user is speaking.

As you say the words the search engine is not only trying to guess the next word in the phrase, but is also displaying search results for the search terms it’s guessing. But that is going to be a better experience with a faster mobile connection.

It isn't "the" killer app for 4G, but it will help differentiate the experience from the same app running on a 3G network, at least potentially.

'Google Instant' On Smartphones