You should read the text. It's full of cloud and tech references, because KitKat and Google are promoting the next Android Version (Android 4.4 will be named KitKat).

Also you can win some Google Gadgets with KitKat (at the bottom).

It is preferably referred to as parallax scrolling, which is very common with single page designs these days. Unless otherwise used with the right intention and for the right purpose parallax scrolling technique is becoming the new carousel or from the olden days "skip intro".

I'm not sure that's the right term. Parallax refers to two or more planes moving at different speeds to give the illusion of depth.

This was trending on HN earlier today. I think the reason it's on the front page is because of the parody on Android's new version being named Kit Kat.

Looks to me like this was a joint marketing campaign by Google and Nestle. Seems successful.

The new android is called kitkat apparently. www.android.com/kitkat