If you recently went to the movie and watched Inception with Leonardo DiCaprio you might find yourself a little bit dazed by what just happened. It's the result of your brain working to understand a good plot. Yes, it was a good story and even though not entirely original, it's surely worth your bucks.
When was the last time you sat with your popcorn basket and a cold soda to watch a movie that squeezed your brain? Maybe when you went watching The Matrix in 1999? I guess yes. Science fiction is good material and especially if it comes out of directly from the director.
When the The Matrix came out I watched it three times the same weekend it opened. After that Hollywood rediscovered Phillip K. Dick and his works translating into major flicks some of his novels and short stories like Minority Report, A Scanner Darkly, Paycheck and upcoming The Adjustment Bureau; and in the recent past two major titles like Blade Runner (1982) and Total Recall (1990). Another example of a successful book-to-screen is Dune. The 1984 adaptation from the Frank Herbert's book was praised for it's accuracy, acting and special effects in a period where no CGI was available. It worked and the result was striking.
I believe that more can be done and I'm talking about quality. But Hollywood I don't think that Hollywood will have the monopoly on the good sci-fi chapter. Movies like 28 Days Later, District 9 and Cube were huge success from outside production who pointed on making stories where people would talk about for years.
On the other side there I felt cheated when I watched I-Robot, especially after reading the book by Asimov.
Do I expect too much? Yes, if we are talking about novels that are milestones and helped shape science fiction throughout the years.
There is the need to oversee a better quality in sci-fi movies because there is a huge crowd out there of passionate people who are avid reader of books, comic books and meticulousness attend conventions dressed as their favorite character in movies and TV shows. Those are men and women who treasure details and want their experience to go beyond the silver screen because they can appreciate a good work of art, rather than buying a ticket to waste their weekends watching poor films like Doomsday or Outlander.
But at the same time we have to be careful when dealing with remakes such as The Day Earth Stood Still because there's a risk to ruin the original, or forcing to extend the saga making Terminator 5, 6, 7, etc.