Sci Fi Remakes, Why?

I found a video that talks about Hollywood remakes of classic science fiction movies, specifically for the year 2009. I think the studios do remakes because of budget constraints and the idea that if it worked once it will be good again with new technology applied into it. I hope that since most movies are being made with lower budgets due to the economic times, being made outside Hollywood, and in other countries, just maybe there will be original scripts written or movies made from current science fiction literature. I hope so because sometimes the original is the best and no matter how fancy the new version, the original cannot be beat, besides, I would like some fresh stories that make me think, I guess I want too much!