The god of thunder rolled into theaters this weekend, and is certain to rule the box office. Moviegoers have the option of seeing “Thor” in 2-D or 3-D. It must be said, though, that I found the Coke trailer before the movie had 3-D almost as exciting as that featured in the film. The problem is that 3-D movies are almost invariably made to offer theatergoers — and, of course, home viewers — the option of seeing them in 2-D. So directors can’t film with an eye just to how the movie will look in one of the two; they must work in what are almost two different genres. The result is 3-D movies that don’t take full advantage of an exciting technology.

“Thor” has battles for men and eye candy for women. Females reluctant to see a comic book flick will likely flock to “Something Borrowed” this weekend. Based on the best-selling novel by Emily Giffin, the movie stars Ginnifer Goodwin as a woman secretly in love with her best friend’s (Kate Hudson) fiance. It’s a perfect pairing. Blond and impossibly thin Hudson looks just like the girl who gets everything she wants, while Goodwin is a charming actress, but without Hudson’s shine.