One of the main reasons to buy a Nexus device is the fact that they're always the first to get new Android updates. Another great selling point for the Nexus series is that the devices are amongst the easiest to root and mod. Unfortunately, though, these two features are somewhat mutually exclusive.
According to a study done by Kaspersky, 7.6% of Android users root their phones. That may not sound like a lot, but with over 2 billion Android devices out there, the math works out to over 150 million rooted phones — more than the total population of Russia, Mexico, or Japan — so root nation is an important demographic that deserves being catered to.
Speech recognition software made it easy to search Google on your smartphone, and Google Goggles made it easy to find answers from camera snapshots on your device. But now Google's bringing similar technology straight to your desktop, and with faster results—faster than Google Instant.