Spielberg directing a sci-fi movie? Awesome. In that genre, he's been extremely successful. How can anyone not be excited about the man who directed Close Encounters, E.T., Jurassic Park, A.I., Minority Report, and War of the Worlds, directing a big-budget post-apocalypse movie? The only mediocre sf movie he's ever made is Lost World. Not a bad track record at all.
Oh, and the title? It's awful. And yes, I think, even though it's based on a book, they should change the title. (A.I. was not the title of the original short story it was based on; Blade Runner is not the title of its source material - why not change the title?)