The design of your poster (black border, text under it) reminded me a lot of the one of demotivational posters.
Now it appears you never even heard of it, so it is accidental.
You can also understand the reaction it triggers to people knowing about demotivational posters.
At last you should rather consider the posts in this topics as constructive criticism to help you improve your poster, rather than negative remarks.
Don't take it the wrong way.
Most of them are true : the quality of the models (high poly, full textured etc) on your poster can lead to believe that CC is able and made for such models. It can display it, true, but as scidave pointed out, it is not "out of the box" and requires quite a load of work prior.
Maybe adding screenshot of 2D games to the (empty) background and having some 3D models and some 2D characters in the foreground will help having a better visualization of the purpose of CC.
Else you're right, "imagination is the limit" that's why I find this promo a bit empty. It lacks elements, it lacks crazyness.
You can do it far better, especially if it is meant as a promo/marketing purpose.
Once again, constructive criticism, not just blatant "huh you're doing wrong go and hide under a rock". ^^
I'm now waiting for the next version.