Erica Ogg for GigaOM:

Snapguide and Paper have two things in common. Both appeal to the creative side of mobile users, and both are themselves beautifully made and deceptively simple to use.I think it’s these qualities that are going to provide a roadmap for more iOS apps to come that will appeal to the artsy, creative side of people, rather than the traditional consumption-oriented theme of what have so far been the most popular types of apps on Apple’s platform.

Absolutely right. We’ve gone through several of these waves of apps from productivity to games and every time developers start to push the envelope of what can be done, we get another one. Creativity looks to be the new wave.