like they said on extra credits:''idea's are cheap.'' Its not hard to come up with an idea for a game or a story, its making an idea that works and sells. Alot of games started off very diffrent from the end product. 

It takes months of preproduction to refine an idea and get an actual full-fledged concept out of it (budget, innovation, technical restrictions, market, platform, scope, controls, style, narrative, etc.)

Unless you have a 2000 page game design document ready, please stop saying it's [this] in the style of [this]. 

Ideas are a dime a dozen. Even the great ones. It's hard work that gets a game made.

About new gaming ideas...