Thanks for your kind words about Icenium. Regarding your questions they are right on spot. If you look at all the products that Telerik is building you will definitely find some that will fulfill the Application Life Cycle picture. We will work through the course of next year to have a more complete story in Icenium
About your question for how teams collaborate in Icenium - we do support Git version control and the experience is similar to the one found in modern IDEs like VS and Eclipse. We do have exclusive support for GitHub, but we do support the standard Git protocol so any git repository is supported. We have some ideas how to further extend this, but there is nothing specific I can share with you at this point in time.
Regarding your question for different environments this is also an area we have thought about. We have not done anything specific to enable it, but it is definitely something that we are going to tackle in the future.
Hope this helps,
the Icenium team
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