The four ads that you can see right below aim to show off the new features of Windows 8 and how it works across a range of devices - from your desktop PC to your tablet.
It shows off the awesome new ways you can unlock your screen by tapping on certain areas of a picture you’ve chosen for example, and it also demonstrates how quick and smooth the new interface is and how gestures like swiping from the left bring up previous apps. So basically, these ads are a mixture of showing off the new features and trying to instantly teach customers how to use them.
It seems that Microsoft is also readying a second batch of ads, this time solely about its Surface tablet. Microsoft has painted New York and other cities with street art for its Surface, and there are plenty of traditional ads in the subway system of a few cities, so that’s definitely telling we’ll see a big midnight launch for the tablet on October 26th.
source: Techit via Neowin