Dude, video games themselves are possibly the biggest artistic advancement of the last few centuries. Interactive narrative and all that? Just because there are sequels and remakes does not mean we have stagnated, it simply means that some people aren't exerting an intense amount of creativity. Welcome to the world of any and every art form since the beginning of time.
You seem to be forgetting the fact that the times we idolize, the eras that brought us Shakespeare, Citizen Kane, War and Peace, Chrono Trigger, or whatever other classics you want to name, also had tons and tons of remakes, retellings, sequels, and overall crap. Beyond that, half of Shakespeares plays are based on historical events, and half of the rest are based on folktales and legends. You know why we don't talk about how creatively bankrupt everything was at the time? Because we don't remember the crap. That is the only reason. All this stuff that you're saying is creatively bankrupt will simply be forgotten and the all-time classics we're making (and we are making them) will be remembered.
Beyond that, you are unwise to so universally condemn remakes as you are. Did you complain when Casablanca released on DVD with remastered visuals and special features and documentaries? What makes that any different from Halo: Anniversary, or Beyond Good and Evil HD, or any other remake out there? Some classics are worth remembering, and not only does that mean it's worth re-releasing them now and again to introduce them to a new audience, but it also means it's worthwhile for such a classic to be experienced again in a slightly new light, or in the context of new developments that have occurred since the work's original creation. There is absolutely nothing wrong with that, and until you can name more releasing remakes than original games (including sequels, since dismissing the artistic worth of sequels based solely on their status as a sequel is just plain stupid), there never will be.