Main advantages

- - Speeding up creating of any model
- Making the graphics look like a set
- To attract new artsists, by making it easy for people to use and share materials

- - Create an universal mesh on which materials can be shown. (semi-done)
- Create a wiki page or forum's topic with material previews and a .blend file downloads. This shall be discussed below.
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I made an illustrating render. It shows one material, which is usually used as cobbelstone. You see, it's not only the ground, that's because i wanted to shown how the material looks on different types of shapes and shadows. However, we shall make a consensus on a default one to let users start making their own as soon as possible.