Half a million Lego pieces put together in an amazing life size air powered car that is able to reach speeds up to 20 mph, how incredible does that sound?
At any given time you can reset your Nexus 4 smartphone to the factory default settings, meaning you will bring your phone back to the same state as it was on a day when you took it out of the box.
In this day of age, it's very practical to have a Windows 7 installation on your USB key, for many netbooks and devices don't come with CD/DVD drives anymore.