These iPad mini ads are perfect examples of Apple's ability to take advantage of the product recognition and existing ecosystem and to communicate really big things in really simple ways.
Let's compare these to the Surface advert. MS's ad made a lot of noise with a big focus on the attachable keyboard and kick stand. It was the advertising equivalent of someone shouting over and over again "you can attach a keyboard and there's a kick stand!!!". The focus was on a couple of features with a lot of singing and dancing (literally, in part) to make it all seem exciting.
The iPad mini ads, on the other hand, could not have had a simpler brief: it's an iPad, but it's smaller.
The iPad is a well recognised product so needs no introduction - it's an iPad. The message is clear - you can do the same on this as you can on the iPad but it's smaller. The focus isn't on features, it's on the concept of what an iPad is. An iPad is fun. It's creative. It's simple!
These adverts are a great sign that Apple still knows what it's about when it comes to making great products - simple, engaging and unique experiences.