The best thing regarding Unity Game Engine is that it enables the creation of projects on multiple platforms, so may developers would love to be able to create their 3D assets from within the engine itself and this is where GameDraw comes in handy , it can be used for as a complementary tools to complete an already existing tools or it can be used to create models from the scratch , now with the availability of a free version  things has become more easy and fun for young studios or even for those who want to do prototyping , check the below videos of models created using GameDraw as a main modeling tools on top of the UnityGame Engine

Plese check the below videos that have been created on GameDraw :

http://www.youtube.com/watch?v=UugEiuIJKYA

http://www.youtube.com/watch?v=6nWzjTZP0TQ


I really advise you to use it and give feedback on it , now the only thing needed is the creativity of Artists and developers

Cheers